most of the mass of an atom is found in the n
the atomic mass is the mass of the p
the atomic number is the number of p.
the periodic table is arranged by atomic n
most of the elements on the periodic table are m

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

the volume increases