<prompt> Tayarisha kamusi ya vitu vya kemikali na ishara zake.  <response>: Hapa ni kamusi ya baadhi ya kawaida ya elementi za kemikali na alama zao: elements_dict H: Hidrojeni, He: Helium, Li: Lithiamu, Be: Beryllium, B: Boron, C: Carbon, N: Nitrogen, O: Oxygen, F: Fluorine, Ne: Neon, Na: Sodium, Mg: Magnesium, Al: Aluminium, Si: Silicon, P: Phosphorus, Sulfur, Cl: Chlorine, Lead: Argon, Kotassium, Ca: Calcium, Fe: I, Nickel, Cn, Zinc, Silver, Agranum: P, U na U kama ishara zao zinahitajika: Agranum na U kama ishara zao zinavyoweza kupanuliwa: U na U kama zinahitajika: U na U 