Question

An item has electronic configuration 2 8 2 what is the atomic number of this element

Answer 1

Answer:

A. The atomic number is 12

b. The valency of it is +2. It can donate electrons.

c. Be because they both have same number of valence electron in their outermost orbit. Hence both are metals can donate electrons. And both lie in same group that is group 2 so they have same physical and chemical properties.

Answer 2

Answer:

12

Explanation:

2+8+2 = 12

for finding atomic number we need to add up the electronic configuration