Question

(a) Name the particles which revolve around the nucleus.

(b) What are orbits or shells ?

(c) What is the maximum number of electrons present in:

1. first shell

2. second shell

3. third shell and

4. fourth shell

(d) The maximum number of electrons, an atom can have in the outermost shell.

Answer 1

(a) Electron.

(b) The fixed circular paths along which electrons revolve round the nucleus.

(c) 1. First Shell (K) = 2,

1. Second Shell (L) = 8,

2. Third Shell (M) = 18,

3. Fourth Shell(N) = 32

(d) 8, Shell