Question

Write down the electronic configuration and valency of the following elements.

a) Na (Atomic number-11)

b) F (Atomic number-9)

c) Al ( Atomic number-13)​

Answer 1

Answer:

electronic configuration of Na is 2,8,1 and valency is 1 because no of electron present in last shell or orbit is the valency of that element

2) 2,8,1(flourine)

3)2,8,3(aluminium)

Answer 2

Answer:

a)Na - 2,8,1

b) F - 2,7

c) Al - 2,8,3