Question

Which pair of atoms has same number of valence electrons? give reason.
a) F and Ar b) Na and K c) Be and Al d) O and P

please answer i will mark ou brainlist.

Answer 1

Answer:

D

Explanation:

they have 6 valence electrons which means that they have 2 valence shells'

Answer 2

Answer:

b) Na and k is the answer ..

Explanation:

At no . E.C Valence

11 (Na) 2,8,1 1

19 (k) 2,8,8,1. 1

valance electrons: e- in the last shell .

Rule:

1-if the number of valance electron are 1,2,3,4 then valency is equal to the number of valance electron

2- if the number of valance electron are 5,6,7,8 then valency is eaqual to 8 - the number of valance electron ..

if ve- = 1,2,3,4 so. ve- = valency

if ve- = 5,6,7,8. so. 8-ve- = valency

.. Note - Ec means electronic configuration (Arrangement of the electron in the shell)

Hope it will help .

Rate as a brainliest...