Question

Q. 2. Illustrate that Na atom has completely filled K
and L shells. ​

Answer 1

Explanation:

Sodium atom (Na), has atomic number = 11

Number of protons = 11

Number of electrons = 11

Electronic configuration of Na = K,L,M⇒2,8,1

Sodium atom (Na) looses 1 electron to become stable and form Na+ ion. Hen it has completely filled K and L shells.

Answer 2

Answer:

An atom of Na has a total of 11 electrons. ... But, Na+ ion has one electron less than Na atom i.e. it has 10 electrons. Therefore, 2 electrons go to K-shell and 8 electrons go to L-electrons, thereby completely filling K and L shells.

Explanation: