Based on the average mass of scandium on the periodic table, which isotope of scandium is more common

45

Explanation:

The given atomic mass is 44.96 amu. If you take the average and round it to the nearest whole number it will be the most abundant isotope.

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).