Ncert Exercises & Solutions

Which of the following reasons explain why gallium has a smaller atomic radius than aluminium?

a. Poor screening effect of d and f orbitals

b. Increase in nuclear charge

c. Presence of higher orbitals

d. Higher atomic number

Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)