Question

Match the following regions with the maximum no. of electrons they can hold.

• A. 8
• B. 18
• C. 2

Answer 1

Each shell can hold $2n^2$ electrons, where n = shell number.
So, no. of electrons the given shells can hold are as follows:
i) First shell = $2\times 1^2=2$
ii) Second shell = $2\times 2^2=8$
iii) Third shell = $2\times 3^2=18$