Question

What would be the atomic number of the element in whose atom the K and L shells are full ?

• A. 10
• B. 12
• C. 14
• D. 16

Answer 1

Answer:

A. 10

K shell holds 2 electrons and L shell holds 8 electrons so it both are completely filled then the number of electron =2+8=10 and this element is Neon.