Question

 If X is an element with atomic mass 23 and number of neutrons 12, identify X. *


Sodium

Calcium

Chlorine

Potassium​

Answer 1

Explanation:

Atomic number of element A = mass number - number of neutrons = 23 – 12 = 11

∴ Number of electron = 11

∴ Electronic configuration of A = 2, 8, 1

∴ The element belongs to group 1 of the periodic table.