Question

An atom has 4 electrons in its outermost shell. what will be the atomic number of this element if 1st and 2nd orbits are complete. find the valence of the element?​

Answer 1

Answer: 2,8,4 =14(atomic number)

Valence = 4

Name of atom= silicon

Explanation:

Answer 2

Given atom Has 4 electrons in the outermost shell and first and second shell orbits are filled completely.

So Electronic configuration of element would be : 2,8, 4

K= 2

L= 10

M=4

Atomic number of element =14

The Name of the element is Silicon

Belongs to group 14 in periodic table

Valence electrons are = 4

valence electrons are the outermost electrons of the atom

So valency= 4