Structure of the Atom — Question 1

(i) A carbon atom has 6 electrons.

In the first orbit or K-shell = 2 electrons;

In the second orbit or L-shell = 4 electrons;

We can also express the electron distribution in a carbon atom as 2, 4.

(ii) A sodium atom has 11 electrons.

In the first orbit or K shell = 2 electrons;

In the second orbit or L-shell = 8 electrons;

In the third orbit or M-shell = 1 electron

We can express the electron distribution in a sodium atom as 2, 8, and 1.