text: import tkinter as tk
  # Creates and Initiates class 'App'
  
  
  class App(tk.Frame):
      def __init__(self, parent, *args, **kwargs):
          tk.Frame.__init__(self, parent, *args, **kwargs)
          self.parent = parent
  
          self.winfo_toplevel().title("Periodic Table of the Elements")
          self.topLabel = tk.Label(self, text="Click the element you would like information about.", font=20)
          self.topLabel.grid(row=0, column=0, columnspan=18)
  
  
          # Names of tk.Buttons in column 1
          column1 = [
              ('H', 'Hydrogen', 'Atomic # = 1\nAtomic Weight =1.01\nState = Gas\nCategory = Alkali Metals'),
              ('Li', 'Lithium', 'Atomic # = 3\nAtomic Weight = 6.94\nState = Solid\nCategory = Alkali Metals'),
              ('Na', 'Sodium', 'Atomic # = 11\nAtomic Weight = 22.99\nState = Solid\nCategory = Alkali Metals'),
              ('K', 'Potassium', 'Atomic # = 19\nAtomic Weight = 39.10\nState = Solid\nCategory = Alkali Metals'),
              ('Rb', 'Rubidium', 'Atomic # = 37\nAtomic Weight = 85.47\nState = Solid\nCategory = Alkali Metals'),
              ('Cs', 'Cesium', 'Atomic # = 55\nAtomic Weight = 132.91\nState = Solid\nCategory = Alkali Metals'),
              ('Fr', 'Francium', 'Atomic # = 87\nAtomic Weight = 223.00\nState = Solid\nCategory = Alkali Metals')]
          # create all tk.Buttons with a loop
          r = 1
          c = 0
          for b in column1: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="grey",
                        command=lambda text=b:  self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column2 = [
              ('Be', 'Beryllium', 'Atomic # = 4\nAtomic Weight = 9.01\nState = Solid\nCategory = Alkaline Earth Metals'),
              ('Mg', 'Magnesium', 'Atomic # = 12\nAtomic Weight = 24.31\nState = Solid\nCategory = Alkaline Earth Metal'),
              ('Ca', 'Calcium', 'Atomic # = 20\nAtomic Weight = 40.08\nState = Solid\nCategory = Alkaline Earth Metals'),
              ('Sr', 'Strontium', 'Atomic # = 38\nAtomic Weight = 87.62\nState = Solid\nCategory = Alkaline Earth Metal'),
              ('Ba', 'Barium', 'Atomic # = 56\nAtomic Weight = 137.33\nState = Solid\nCategory = Alkaline Earth Metals'),
              ('Ra', 'Radium', 'Atomic # = 88\nAtomic Weight = 226.03\nState = Solid\nCategory = Alkaline Earth Metals')]
          r = 2
          c = 1
          for b in column2: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="light green",
                        command=lambda text=b:  self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column3 = [
              ('Sc', 'Scandium', 'Atomic # = 21\nAtomic Weight = 44.96\nState = Solid\nCategory = Trans Metals'),
              ('Y', 'Yttrium', 'Atomic # = 39\nAtomic Weight = 88.91\nState = Solid\nCategory = Trans Metals'),
              ('La   >|', 'Lanthanum', 'Atomic # = 57\nAtomic Weight = 138.91\nState = Solid\nCategory = Trans Metals'),
              ('Ac   >|', 'Actinium', 'Atomic # = 89\nAtomic Weight = 227.03\nState = Solid\nCategory = Trans Metals')]
          r = 4
          c = 2
          for b in column3: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="light goldenrod",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column4 = [
              ('Ti', 'Titanium', 'Atomic # = 22\nAtomic Weight = 47.90\nState = Solid\nCategory = Trans Metals'),
              ('Zr', 'Zirconium', 'Atomic # = 40\nAtomic Weight = 91.22\nState = Solid\nCategory = Trans Metals'),
              ('Hf', 'Hanium', 'Atomic # = 72\nAtomic Weight = 178.49\nState = Solid\nCategory = Trans Metals'),
              ('Rf', 'Rutherfordium', 'Atomic # = 104\nAtomic Weight = 261.00\nState = Synthetic\nCategory = Tran Metal')]
          r = 4
          c = 3
          for b in column4: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="light goldenrod",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 10: 
                  r = 1
                  c += 1
  
          column5 = [
              ('V', 'Vanadium', 'Atomic # = 23\nAtomic Weight = 50.94\nState = Solid\nCategory = Trans Metals'),
              ('Nb', 'Niobium', 'Atomic # = 41\nAtomic Weight = 92.91\nState = Solid\nCategory = Trans Metals'),
              ('Ta', 'Tantalum', 'Atomic # = 73\nAtomic Weight = 180.95\nState = Solid\nCategory = Trans Metals'),
              ('Ha', 'Hahnium', 'Atomic # = 105\nAtomic Weight = 262.00\nState = Synthetic\nCategory = Trans Metals')]
          r = 4
          c = 4
          for b in column5: 
              tk.Button(self,
                        text=b[0],
                        width=5, height=2,
                        bg="light goldenrod",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 10: 
                  r = 1
                  c += 1
  
          column6 = [
              ('Cr', 'Chromium', 'Atomic # = 24\nAtomic Weight = 51.99\nState = Solid\nCategory = Trans Metals'),
              ('Mo', 'Molybdenum', 'Atomic # = 42\nAtomic Weight = 95.94\nState = Solid\nCategory = Trans Metals'),
              ('W', 'Tungsten', 'Atomic # = 74\nAtomic Weight = 183.85\nState = Solid\nCategory = Trans Metals'),
              ('Sg', 'Seaborgium', 'Atomic # = 106\nAtomic Weight = 266.00\nState = Synthetic\nCategory = Trans Metals')]
          r = 4
          c = 5
          for b in column6: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="light goldenrod",
                        command=lambda text=b:  self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column7 = [
              ('Mn', 'Manganese', 'Atomic # = 25\nAtomic Weight = 178.49\nState = Solid\nCategory = Trans Metals'),
              ('Tc', 'Technetium', 'Atomic # = 43\nAtomic Weight = 178.49\nState = Synthetic\nCategory = Trans Metals'),
              ('Re', 'Rhenium', 'Atomic # = 75\nAtomic Weight = 178.49\nState = Solid\nCategory = Trans Metals'),
              ('Bh', 'Bohrium', 'Atomic # = 107\nAtomic Weight = 262.00\nState = Synthetic\nCategory = Trans Metals')]
          r = 4
          c = 6
          for b in column7: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="light goldenrod",
                        command=lambda text=b:  self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column8 = [
              ('Fe', 'Iron', 'Atomic # = 26\nAtomic Weight = 55.85\nState = Solid\nCategory = Trans Metals'),
              ('Ru', 'Ruthenium', 'Atomic # = 44\nAtomic Weight = 101.07\nState = Solid\nCategory = Trans Metals'),
              ('Os', 'Osmium', 'Atomic # = 76\nAtomic Weight = 190.20\nState = Solid\nCategory = Trans Metals'),
              ('Hs', 'Hassium', 'Atomic # = 108\nAtomic Weight = 265.00\nState = Synthetic\nCategory = Trans Metals')]
          r = 4
          c = 7
          for b in column8: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="light goldenrod",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column9 = [
              ('Co', 'Cobalt', 'Atomic # = 27\nAtomic Weight = 58.93\nState = Solid\nCategory = Trans Metals'),
              ('Rh', 'Rhodium', 'Atomic # = 45\nAtomic Weight = 102.91\nState = Solid\nCategory = Trans Metals'),
              ('Ir', 'Iridium', 'Atomic # = 77\nAtomic Weight = 192.22\nState = Solid\nCategory = Trans Metals'),
              ('Mt', 'Meitnerium', 'Atomic # = 109\nAtomic Weight = 266.00\nState = Synthetic\nCategory = Trans Metals')]
          r = 4
          c = 8
          for b in column9: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="light goldenrod",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column10 = [
              ('Ni', 'Nickle', 'Atomic # = 28\nAtomic Weight = 58.70\nState = Solid\nCategory = Trans Metals'),
              ('Pd', 'Palladium', 'Atomic # = 46\nAtomic Weight = 106.40\nState = Solid\nCategory = Trans Metals'),
              ('Pt', 'Platinum', 'Atomic # = 78\nAtomic Weight = 195.09\nState = Solid\nCategory = Trans Metals')]
          r = 4
          c = 9
          for b in column10: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="light goldenrod",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column11 = [
              ('Cu', 'Copper', 'Atomic # = 29\nAtomic Weight = 63.55\nState = Solid\nCategory = Trans Metals'),
              ('Ag', 'Silver', 'Atomic # = 47\nAtomic Weight = 107.97\nState = Solid\nCategory = Trans Metals'),
              ('Au', 'Gold', 'Atomic # = 79\nAtomic Weight = 196.97\nState = Solid\nCategory = Trans Metals')]
          r = 4
          c = 10
          for b in column11: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="light goldenrod",
                        command=lambda text=b:  self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column12 = [
              ('Zn', 'Zinc', 'Atomic # = 30\nAtomic Weight = 65.37\nState = Solid\nCategory = Trans Metals'),
              ('Cd', 'Cadmium', 'Atomic # = 48\nAtomic Weight = 112.41\nState = Solid\nCategory = Trans Metals'),
              ('Hg', 'Mercury', 'Atomic # = 80\nAtomic Weight = 200.59\nState = Liquid\nCategory = Trans Metals')]
          r = 4
          c = 11
          for b in column12: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="light goldenrod",
                        command=lambda text=b:  self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column13_1 = [
              ('B', 'Boron', 'Atomic # = 5\nAtomic Weight = 10.81\nState = Solid\nCategory = Nonmetals')]
          r = 2
          c = 12
          for b in column13_1: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="Light Blue",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column13_2 = [
              ('Al', 'Aluminum', 'Atomic # = 13\nAtomic Weight = 26.98\nState = Solid\nCategory = Other Metals'),
              ('Ga', 'Gallium', 'Atomic # = 31\nAtomic Weight = 69.72\nState = Solid\nCategory = Other Metals'),
              ('In', 'Indium', 'Atomic # = 49\nAtomic Weight = 69.72\nState = Solid\nCategory = Other Metals'),
              ('Ti', 'Thallium', 'Atomic # = 81\nAtomic Weight = 204.37\nState = Solid\nCategory = Other Metals')]
          r = 3
          c = 12
          for b in column13_2: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="Light Pink",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column14_1 = [
              ('C', 'Carbon', 'Atomic # = 6\nAtomic Weight = 12.01\nState = Solid\nCategory = Nonmetals'),
              ('Si', 'Silicon', 'Atomic # = 14\nAtomic Weight = 28.09\nState = Solid\nCategory = Nonmetals')]
          r = 2
          c = 13
          for b in column14_1: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="Light Blue",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column14_2 = [
              ('Ge', 'Germanium', 'Atomic # = 32\nAtomic Weight = 72.59\nState = Solid\nCategory = Other Metals'),
              ('Sn', 'Tin', 'Atomic # = 50\nAtomic Weight = 118.69\nState = Solid\nCategory = Other Metals'),
              ('Pb', 'Lead', 'Atomic # = 82\nAtomic Weight = 207.20\nState = Solid\nCategory = Other Metals')]
          r = 4
          c = 13
          for b in column14_2: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="Light Pink",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column15_1 = [
              ('N', 'Nitrogen', 'Atomic # = 7\nAtomic Weight = 14.01\nState = Gas\nCategory = Nonmetals'),
              ('P', 'Phosphorus', 'Atomic # = 15\nAtomic Weight = 30.97\nState = Solid\nCategory = Nonmetals'),
              ('As', 'Arsenic', 'Atomic # = 33\nAtomic Weight = 74.92\nState = Solid\nCategory = Nonmetals')]
          r = 2
          c = 14
          for b in column15_1: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="Light Blue",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column15_2 = [
              ('Sb', 'Antimony', 'Atomic # = 51\nAtomic Weight = 121.75\nState = Solid\nCategory = Other Metals'),
              ('Bi', 'Bismuth', 'Atomic # = 83\nAtomic Weight = 208.98\nState = Solid\nCategory = Other Metals')]
          r = 5
          c = 14
          for b in column15_2: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="Light Pink",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column16_1 = [
              ('O', 'Oxygen', 'Atomic # = 8\nAtomic Weight = 15.99\nState = Gas\nCategory = Nonmetals'),
              ('S', 'Sulfur', 'Atomic # = 16\nAtomic Weight = 32.06\nState = Solid\nCategory = Nonmetals'),
              ('Se', 'Selenium', 'Atomic # = 34\nAtomic Weight = 78.96\nState = Solid\nCategory = Nonmetals'),
              ('Te', 'Tellurium', 'Atomic # = 52\nAtomic Weight = 127.60\nState = Solid\nCategory = Nonmetals')]
          r = 2
          c = 15
          for b in column16_1: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="Light Blue",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column16_2 = [
              ('Po', 'Polonium', 'Atomic # = 84\nAtomic Weight = 209.00\nState = Solid\nCategory = Other Metals')]
          r = 6
          c = 15
          for b in column16_2: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="Light Pink",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column17 = [
              ('F', 'Fluorine', 'Atomic # = 9\nAtomic Weight = 18.99\nState = Gas\nCategory = Nonmetals'),
              ('Cl', 'Chlorine', 'Atomic # = 17\nAtomic Weight = 35.45\nState = Gas\nCategory = Nonmetals'),
              ('Br', 'Bromine', 'Atomic # = 35\nAtomic Weight = 79.90\nState = Liquid\nCategory = Nonmetals'),
              ('I', 'Iodine', 'Atomic # = 53\nAtomic Weight = 126.90\nState = Solid\nCategory = Nonmetals'),
              ('At', 'Astatine', 'Atomic # = 85\nAtomic Weight = 210.00\nState = Solid\nCategory = Nonmetals')]
          r = 2
          c = 16
          for b in column17: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="Light Blue",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          column18 = [
              ('He', 'Helium', 'Atomic # = 2\nAtomic Weight = 4.00\nState = Gas\nCategory = Nobel Gases'),
              ('Ne', 'Neon', 'Atomic # = 10\nAtomic Weight = 20.18\nState = Gas\nCategory = Nobel Gases'),
              ('Ar', 'Argon', 'Atomic # = 18\nAtomic Weight = 39.95\nState = Gas\nCategory = Nobel Gases'),
              ('Kr', 'Krypton', 'Atomic # = 36\nAtomic Weight = 83.80\nState = Gas\nCategory = Nobel Gases'),
              ('Xe', 'Xenon', 'Atomic # = 54\nAtomic Weight = 131.30\nState = Gas\nCategory = Nobel Gases'),
              ('Rn', 'Radon', 'Atomic # = 86\nAtomic Weight = 222.00\nState = Gas\nCategory = Nobel Gases')]
          r = 1
          c = 17
          for b in column18: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="indian red",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          self.fillerLine = tk.Label(self, text="")
          self.fillerLine.grid(row=10, column=0)
  
          lanthanide = [
              ('>| Ce', 'Cerium', 'Atomic # = 58\nAtomic Weight = 140.12\nState = Solid\nCategory = Trans Metals'),
              ('Pr', 'Praseodymium', 'Atomic # = 59\nAtomic Weight = 140.91\nState = Solid\nCategory = Trans Metals'),
              ('Nd', 'Neodymium', 'Atomic # = 60\nAtomic Weight = 144.24\nState = Solid\nCategory = Trans Metals'),
              ('Pm', 'Promethium', 'Atomic # = 61\nAtomic Weight = 145.00\nState = Synthetic\nCategory = Trans Metals'),
              ('Sm', 'Samarium', 'Atomic # = 62\nAtomic Weight = 150.40\nState = Solid\nCategory = Trans Metals'),
              ('Eu', 'Europium', 'Atomic # = 63\nAtomic Weight = 151.96\nState = Solid\nCategory = Trans Metals'),
              ('Gd', 'Gadolinium', 'Atomic # = 64\nAtomic Weight = 157.25\nState = Solid\nCategory = Trans Metals'),
              ('Tb', 'Terbium', 'Atomic # = 65\nAtomic Weight = 158.93\nState = Solid\nCategory = Trans Metals'),
              ('Dy', 'Dyprosium', 'Atomic # = 66\nAtomic Weight = 162.50\nState = Solid\nCategory = Trans Metals'),
              ('Ho', 'Holmium', 'Atomic # = 67\nAtomic Weight = 164.93\nState = Solid\nCategory = Trans Metals'),
              ('Er', 'Erbium', 'Atomic # = 68\nAtomic Weight = 167.26\nState = Solid\nCategory = Trans Metals'),
              ('Tm', 'Thulium', 'Atomic # = 69\nAtomic Weight = 168.93\nState = Solid\nCategory = Trans Metals'),
              ('Yb', 'Ytterbium', 'Atomic # = 70\nAtomic Weight = 173.04\nState = Solid\nCategory = Trans Metals'),
              ('Lu', 'Lutetium', 'Atomic # = 71\nAtomic Weight = 174.97\nState = Solid\nCategory = Trans Metals')]
          r = 11
          c = 3
          for b in lanthanide: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="light goldenrod",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              c += 1
              if c > 18: 
                  c = 1
                  r += 1
  
          actinide = [
              ('>| Th', 'Thorium', 'Atomic # = 90\nAtomic Weight = 232.04\nState = Solid\nCategory = Trans Metals'),
              ('Pa', 'Protactinium', 'Atomic # = 91\nAtomic Weight = 231.04\nState = Solid\nCategory = Trans Metals'),
              ('U', 'Uranium', 'Atomic # = 92\nAtomic Weight = 238.03\nState = Solid\nCategory = Trans Metals'),
              ('Np', 'Neptunium', 'Atomic # = 93\nAtomic Weight = 237.05\nState = Synthetic\nCategory = Trans Metals'),
              ('Pu', 'Plutonium', 'Atomic # = 94\nAtomic Weight = 244.00\nState = Synthetic\nCategory = Trans Metals'),
              ('Am', 'Americium', 'Atomic # = 95\nAtomic Weight = 243.00\nState = Synthetic\nCategory = Trans Metals'),
              ('Cm', 'Curium', 'Atomic # = 96\nAtomic Weight = 247\nState = Synthetic\nCategory = Trans Metals'),
              ('Bk', 'Berkelium', 'Atomic # = 97\nAtomic Weight = 247\nState = Synthetic\nCategory = Trans Metals'),
              ('Cf', 'Californium', 'Atomic # = 98\nAtomic Weight = 247\nState = Synthetic\nCategory = Trans Metals'),
              ('Es', 'Einsteinium', 'Atomic # = 99\nAtomic Weight = 252.00\nState = Synthetic\nCategory = Trans Metals'),
              ('Fm', 'Fermium', 'Atomic # = 100\nAtomic Weight = 257.00\nState = Synthetic\nCategory = Trans Metals'),
              ('Md', 'Mendelevium', 'Atomic # = 101\nAtomic Weight = 260.00\nState = Synthetic\nCategory = Trans Metals'),
              ('No', 'Nobelium', 'Atomic # = 102\nAtomic Weight = 259\nState = Synthetic\nCategory = Trans Metals'),
              ('Lr', 'Lawrencium', 'Atomic # = 103\nAtomic Weight = 262\nState = Synthetic\nCategory = Trans Metals')]
          r = 12
          c = 3
          for b in actinide:
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="light goldenrod",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              c += 1
              if c > 18: 
                  c = 1
                  r += 1
  
          reset = [
              ('Reset', 'Click the element you would like information about.', '')]
          r = 12
          c = 0
          for b in reset: 
              tk.Button(self,
                        text=b[0],
                        width=5,
                        height=2,
                        bg="black",
                        fg="white",
                        command=lambda text=b: self.name(text[1]) & self.info(text[2])).grid(row=r, column=c)
              r += 1
              if r > 7: 
                  r = 1
                  c += 1
  
          self.infoLine = tk.Label(self, text="", justify='left')
          self.infoLine.grid(row=1, column=3, columnspan=10, rowspan=4)
  
          #self.mainloop() #Comment or remove it
  
  
      # Replaces Label at the top with the name of whichever element tk.Button was pressed
      def name(self, text): 
          self.topLabel.config(text=text)
  
      # Displays information on the element of whichever element tk.Button was pressed
      def info(self, text): 
          self.infoLine.config(text=text)
  
  
  # Creates an instance of 'app' class
  def main():
      root = tk.Tk()
      a = App(root)
      a.grid(row=0, column=0, sticky='nsew') #You forgot to grid your App
      a.mainloop()
  
  
  # runs main function
  if __name__ == "__main__": 
      main()