Why do elements in a group on the periodic table have similar chemical properties?
a. similar atomic masses
b. similar atomic numbers
c. same number of outermost electrons
d. same number of protons

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).