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atomic mass is determined by the number of protons and neutrons & atomic number is only determined by the number of proton of an element -> the difference between atomic mass and atomic number is the number of the neutrons in an element | 1 |
a electron has a negative -1 electric charge & an electron is a kind of charged particle -> an electron is a kind of negatively charged particle | 1 |
an electron is a kind of negatively charged particle & electrons are a part of an atom -> electrons are part of an atom that is negatively-charged | 1 |
electrons are part of an atom that is negatively-charged & electrons are involved in chemical reactions -> negatively charged particles are involved in chemical reactions | 1 |
a point is small in size & an atom is exceptionally small in size -> atoms are similar in size with points | 1 |
atoms are similar in size with points & angstrom unit is used to measure the distance between two points -> angstrom units can be used to measure the distance between atoms | 1 |
atoms in a gas move independently of one another & atoms in a gas collide frequently & the atoms in a substance move independently of ont another and collide frequently -> the substance is likely a gas | 1 |
baking is when a human makes food by adding heat & a cake is a kind of food -> baking cake is adding heat to the cake | 1 |
baking cake is adding heat to the cake & adding heat to an object causes chemical reactions -> baking a cake can cause a chemical reaction to the cake | 1 |
placing a blanket on fire cuts off the oxygen & a fire requires oxygen to burn -> placing a blanket on fire cuts off the oxygen required for fire to burn | 1 |
placing a blanket on fire cuts off the oxygen required for fire to burn & if something is required for a process then keeping that something from reaching that process can stop that process -> placing a blanket on fire will stop the fire from burning | 1 |
the drain cleaner is added into water & a drain cleaner consists of sodium hydroxide and aluminum -> sodium hydroxide, aluminum, and water are combined | 1 |
sodium hydroxide, aluminum, and water are combined & hydrogen is produced -> hydrogen is produced when sodium, aluminum, and water are combined | 1 |
sodium hydroxide, aluminum, and water are combined & the solution becomes really hot -> heat energy is released when sodium hydroxide, aluminum, and water are combined | 1 |
hydrogen is produced when sodium, aluminum, and water are combined & heat energy is released when sodium hydroxide, aluminum, and water are combined -> a chemical reaction happened when sodium hydroxide, aluminum, and water are combined | 1 |
iron is a kind of metal & nails are often made of iron -> nails are made of metal | 1 |
nails are made of metal & metals in contact with water and oxygen will rust -> nails in contact with water and oxygen will rust | 1 |
nails in contact with water and oxygen will rust & rust forming is a kind of chemical change -> nails rusting is a kind of chemical change | 1 |
nails rusting is a kind of chemical change & chemical change is a kind of chemical reaction -> nails rusting is a kind of chemical reaction | 1 |
carbon dioxide is a kind of gas & baking soda can react chemically with vinegar producing carbon dioxide -> baking soda can react chemically with vinegar producing a gas | 1 |
vinegar is a kind of substance & baking soda is a kind of substance -> combining baking soda and vinegar is combining two substance together | 1 |
baking soda can react chemically with vinegar producing a gas & combining baking soda and vinegar is combining two substance together -> combining baking soda and vinegar can cause chemical reactions | 1 |
combining baking soda and vinegar can cause chemical reactions & vinegar is added into baking soda -> vinegar being added into baking soda will cause chemical reactions | 1 |
chlorine is a kind of element & sodium is a kind of element -> sodium and chlorine are two elements | 1 |
sodium and chlorine are two elements & sodium chloride is always made of chemically combined chlorine and sodium -> sodium chloride is made of two elements chemically combined | 1 |
sodium chloride is made of two elements chemically combined & a compound is made of two or more elements chemically combined -> sodium chloride is a compound | 1 |
sodium chloride is a compound & sodium and chlorine reacting forms sodium chloride -> sodium and chlorine reacting forms a compound | 1 |
chemical reactions do not cause the total number of atoms to change & photosynthesis is a kind of chemical reaction -> the total number of atoms stay the same in chemical reaction | 1 |
the total number of atoms stay the same in chemical reaction & photosynthesis is a kind of chemical reaction -> the total number of atoms stay the same in photosynthesis | 1 |
the total number of atoms stay the same in photosynthesis & 6 atoms of carbon involves in photosynthesis & carbon is a kind of atom -> the number of carbon atoms stays at 6 in photosynthesis | 1 |
iron in contact with water and oxygen will rust & rust forming is a kind of chemical change -> iron in contact with water and oxygen is a chemical change | 1 |
iron in contact with water and oxygen is a chemical change & chemical change is a kind of chemical reaction -> iron in contact with water and oxygen is a chemical reaction | 1 |
iron in contact with water and oxygen is a chemical reaction & chemical reactions cause new substances to form -> iron in contact with water and oxygen will form new substance | 1 |
zinc chloride and hydrogen gas are new substances & hydrochloric acid combing with zinc forms zinc chloride & hydrochloric acid combing with zinc forms hydrogen gas -> hydrochloric acid combing with zinc forms new substances | 1 |
hydrochloric acid combing with zinc forms new substances & chemical reactions cause new substances to form -> hydrochloric acid combining with zinc is an example of chemical reaction | 1 |
iron in contact with water and oxygen will rust & rust forming is a kind of chemical change -> iron in contact with water and oxygen causes a chemical change | 1 |
iron in contact with water and oxygen causes a chemical change & chemical reactions cause chemical change -> iron in contact with water and oxygen is an example of chemical reactions | 1 |
100 grams vinegar and 5 grams baking soda are combined in a container & baking soda can react chemically with vinegar -> a chemical reaction happens between baking soda and vinegar | 1 |
a chemical reaction happens between baking soda and vinegar & the mass of the reactants of a chemical reaction equals to the products of the chemical reaction -> the mass of baking soda and vinegar is equal to the product of the chemical reaction | 1 |
gas is produced in the chemical reaction between baking soda and vinegar & gas is trapped in the container & if gases are released by a chemical reaction then the total mass of the product will be less than the total mass of the reactants -> the mass of the final product of the baking soda and vinegar will not be less than the mass of the reactants | 1 |
the mass of baking soda and vinegar is equal to the product of the chemical reaction & the mass of the final product of the baking soda and vinegar will not be less than the mass of the reactants -> the mass of the final product of the baking soda and vinegar will be the same as that of baking soda and vinegar | 1 |
100 grams plus 5 grams equals to 105 grams & baking soda is 5 grams & vinegar is 100 grams -> the mass of vinegar and baking soda is 105 grams | 1 |
the mass of the final product of the baking soda and vinegar will be the same as that of baking soda and vinegar & the mass of vinegar and baking soda is 105 grams -> the product of the chemical reaction will be 105 grams | 1 |
water is a kind of liquid at room temperature & water is a kind of compound -> water is a liquid compound at room temperature | 1 |
water is made of hydrogen and oxygen & hydrogen is a kind of gas at room temperature & oxygen is a kind of gas at room temperature -> water can be made by two gases hydrogen and oxygen | 1 |
water is a liquid compound at room temperature & water can be made by two gases hydrogen and oxygen -> water is the liquid compound that can be made by two gases hydrogen and oxygen | 1 |
water is the liquid compound that can be made by two gases hydrogen and oxygen & liquid state is a kind of nongaseous state -> water is the nongaseous compound that can be made by two gases | 1 |
substance y and substance z cannot be broken into simpler particles & an element cannot be decomposed into two or more different substances by simple chemical methods -> substance y and substance z are elements | 1 |
a balloon is a kind of container & a balloon filled with helium -> a balloon filled with helium is an example of a container filled with helium | 1 |
helium is a kind of element & elements are pure substances -> helium is a pure substance | 1 |
a balloon filled with helium is an example of a container filled with helium & helium is a pure substance -> a balloon filled with helium is an example of a container filled with a pure substance | 1 |
iron is a kind of element & rust is made of iron and oxygen & oxygen is a kind of element -> rust is made of iron and oxygen elements | 1 |
table salt is sodum chloride & sodium chloride is always made of chemically combined chlorine and sodium -> table salt is the product of sodium and chloride chemically combined | 1 |
the chemical formula of water is h2o & the number in chemical formula shows the number of atoms of each element in a molecule -> the number in chemical formula of water shows the number of atoms of each element in a water molecule | 1 |
the number in chemical formula of water shows the number of atoms of each element in a water molecule & water is made of hydrogen and oxygen -> the number in chemical formula of water shows the number of hydrogen and oxygen in a water molecule | 1 |
the number in chemical formula of water shows the number of hydrogen and oxygen in a water molecule & the chemical formula of water is h2o -> a molecule of water is made of 2 hydrogen atoms and 1 oxygen atom | 1 |
the elements in the chemical reaction stays the same after the reaction & oxygen reacts with iron to produce rust -> iron and oxygen elements stay the same after the reaction | 1 |
the elements in the chemical reaction stays the same after the reaction & oxygen reacts with hydrogen to produce water -> oxygen and hyrdrogen elements stay the same after the reaction | 1 |
iron and oxygen elements stay the same after the reaction & oxygen and hyrdrogen elements stay the same after the reaction -> the elements of two reactions stay the same | 1 |
sugar is made of carbon, hydrogen, oxygen chemically combined & carbon is a kind of element & hydrogen is a kind of element & oxygen is a kind of element -> sugar is made of three different elements chemically combined | 1 |
sugar is made of three different elements chemically combined & a compound is made of two or more elements chemically combined -> sugar is a kind of compound | 1 |
organic compounds mainly are made of carbon / hydrogen / oxygen / nitrogen & hydrogen is a kind of element -> hydrogen can be found in organic compounds | 1 |
first-aid instant cold pack is a kind of cold pack & cold pack reaction is a kind of endothermic reaction -> first-aid instant cold pack is a kind of endothermic reaction | 1 |
an atom is a kind of object & structure is a property of an object -> structure of an atom is a property of the atom | 1 |
structure of an atom is a property of the atom & organizing is sorting things in order by their properties -> structure of atoms can be used to organize atoms in order | 1 |
structure of atoms can be used to organize atoms in order & atoms of different elements have different structures -> structure of atoms of different elements can be used to organize atoms of different elements | 1 |
elements from the same group in the periodic table are chemically reactive in a similar way & alkaline earth metals are highly chemically reactive -> elements that belong to alkaline earth metals are highly chemically reactive | 1 |
elements that belong to alkaline earth metals are highly chemically reactive & magnesium belongs to alkaline earth metal family , group 2 on the periodic table -> magnesium is highly chemically reactive | 1 |
magnesium is a kind of alkaline earth metal & fluorine is a kind of gas & magnesium and fluorine react chemically producing magnesium fluoride -> magnesium fluoride is a new substance produced by magnesium and fluorine reacting chemically | 1 |
magnesium fluoride is a new substance produced by magnesium and fluorine reacting chemically & chemical reactions cause new substances to form -> a chemical reaction happened between magnesium and fluorine | 1 |
a chemical reaction happened between magnesium and fluorine & combining two substances chemically causes chemical reactions -> a chemical reaction is caused by magnesium and fluorine combined chemically | 1 |
an element cannot be decomposed into two or more different substances by simple chemical methods & sulfur cannot be decomposed into different substances by simple chemical methods -> sulfur is a kind of element | 1 |
iron oxide / rust / fe2o3 is made of iron and oxygen & the chemical symbol for oxygen is o & the chemical symbol for iron is fe -> the chemical symbols for the elements found in iron oxide is fe and o | 1 |
the atom is the smallest particle that has the properties of an element & gold is a kind of element -> gold atom is the smallest particle that can be classified as gold | 1 |
iron is a kind of element & the chemical symbol for iron is fe -> fe is the chemical symbol for iron element | 1 |
elements in the same group on the periodic table of elements have similar properties & chemical reactivity is a property of elements and includes ordered values of reactive / unreactive -> elements from the same group on the periodic table are similar in chemical reactivity | 1 |
if something is made of something else , then that something else will be the component of that something & organic compounds mainly are made of carbon / hydrogen / oxygen / nitrogen -> oxygen is a component of organic compounds | 1 |
oxygen is a component of organic compounds & a component of something means a part of something -> oxygen is a part of organic molecules | 1 |
oxygen gas is made of only oxygen element & if a substance is made of one element , then the substance is called an element -> oxygen gas is an element | 1 |
oxygen gas is an element & o2 is a chemical formula for oxygen gas -> o2 is an element | 1 |
state of matter is a property of matter and includes ordered values of solid / liquid / gas & hydrogen is a kind of gas at room temperature -> the state of matter of hydrogen is gas | 1 |
the state of matter of hydrogen is gas & state of matter is a kind of physical property -> being a gas is a physical property of hydrogen | 1 |
the periodic table of elements can be used for predicting the properties of an element & a periodic table is a kind of scientific model -> a periodic table is the scientific model that can be used to predict the properties of an element | 1 |
an element is identified by its number of protons & proton is a kind of subatomic particle -> an element is identified by the proton number | 1 |
an element is identified by the proton number & gold is a kind of element -> gold element can be identified by its proton number | 1 |
elements in the same group on the periodic table of elements have similar properties & calcium / beryllium belongs to alkaline earth metal family , group 2 on the periodic table -> beryllium has the most similar chemical properties to calcium | 1 |
the chemical symbol for tellurium is te & tellurium is a kind of metalloid -> te is a kind of metalloid | 1 |
antimony is a kind of metalloid & the chemical symbol for antimony is sb -> sb is a kind of metalloid | 1 |
te is a kind of metalloid & sb is a kind of metalloid -> sb and te are both metalloids | 1 |
elements from the same group in the periodic table are chemically reactive in a similar way & elements are all from the first group of the periodic table -> elements from the first group are chemically reactive in a similar way | 1 |
elements from the first group are chemically reactive in a similar way & if the elements have similar chemical reactivity , then the elements will react with other elements in a similar way -> elements from the first group will react with other elements in a similar way | 1 |
elements from the first group will react with other elements in a similar way & oxygen is a kind of element -> elements from the first group will react with oxygen in a similar way | 1 |
if the elements have similar electron configurations , then the elements will be grouped into same family / group on the periodic table of elements & strontium, barium, and radium have similar electrom configurations -> strontium, barium, and radium are grouped together on the periodic table | 1 |
elements in group 18 have complete outer electron shells on the periodic table of elements & helium / neon / argon / krypton / xenon / radon belongs to noble gases family , group 18 on the periodic table -> helium, neon, argon, krypton, xenon, and radon have complete outer electron shells | 1 |
helium, neon, argon, krypton, xenon, and radon have complete outer electron shells & if the outermost electron shell of an atom is complete, then the element of those atoms will not react with other elements easily -> helium, neon, argon, krypton, xenon, and radon will not react with other elements easily | 1 |
elements in the same group on the periodic table of elements have similar properties & a physical property is a kind of property -> elements in the same group in the periodic table will have similar physical properties | 1 |
nitrogen and phosphorus belongs to nitrogen family , group 15 on the periodic table & elements in the same group on the periodic table of elements have similar properties -> nitrogen and phosphorus will have similar properties | 1 |
nitrogen and phosphorus will have similar properties & the chemical symbol for nitrogen is n & the chemical symbol for phosphorus is p -> n and p will have similar properties | 1 |
the outer electron shell is a part of the electron configuration & elements in group 18 have full / complete outer electron shells on the periodic table of elements -> elements in group 18 have similar electron configuration | 1 |
elements in group 18 have similar electron configuration & if the elements have similar electron configurations , then the elements will be grouped into same family / group on the periodic table of elements -> elements in group 18 are grouped together because they have similar electron configuration | 1 |
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