Question

Explain the general trend in first ionisation energy from Na to Ar

Answer 1

Answer:

hey mate

Explanation:

Explanation of this trend

there are more protons in each nucleus so the nuclear charge in each element increases … therefore the force of attraction between the nucleus and outer electron is increased, and … ... so more energy is needed to remove the outer electron.

Answer 2

Answer:

Explanation:

In general, ioniation energy increases from left to right across a given period. Th electrons are added to same principal shell. The nuclear charge increases and due to poor shielding, the effective nuclear charge increases. Due to this, the atomic radii decrease and the ionization energy increases.

Aluminum, however, has a lower ionization energy than magnesium. The electronic configuration of Mg is [Ne]3s  

2

. The electronic configuration of Al is [Ne]3s  

2

3p  

1

. Less energy is required to remove a p electron than a s electron in the same principal energy level