The atomic mass number tells us the number of neutrons and protons in the nucleus of an atom.
Answer:
H2O= +2
CCl4 = +4
Na+= 0
CuCl2= -2
because it may cause burn that causes acid to build up which causes you to keep having an upset stomach
the abbreviation form of full name is called symbol.
the smallest unit of cimpound is called molecule.
