Question

top to bottom in a group of periodic table ionization enthalpy decreases why?​

Answer 1

Answer:i hope this helps u:)

Explanation:

The ionization energy of the elements within a period generally increases from left to right. This is due to valence shell stability. The ionization energy of the elements within a group generally decreases from top to bottom. This is due to electron shielding.

Answer 2

Answer:

because of weakening of attraction of nucleus

Explanation:

as we go down the group, size increases then distance b/w nucleus and valency e increases therefore weakening of attractive force increases.

so easy to remove valency e. so less energy needed