Question

why ionisation enthalpy of silicon is greater than aluminium​

Answer 1

Answer:

Silicon has one more proton than aluminum.

Explanation:

Atomic number of aluminium is 13 and silicon is 14 which means aluminum has 2,8,3 electronic configuration and silicon has 2,8,4 electronic configuration. As a result silicon has a greater attraction for its valence electrons compared to aluminum. Hence more energy is required to remove the valence electron from silicon than aluminum. As the electrons are added in the same shell which results in greater attraction by the nucleus and more energy is required to remove it.

Answer 2

Explanation:

Dimensional Formula of Resistance

The dimensional formula of resistance is given by,

M1 L2 T-3 I-2