How does electron affinity vary along a period ?

How does electron affinity vary down a group ?

How does ionisation energy vary along a period and down a group ?

Define electron gain enthalpy or electron affinity. How does it vary along the period and down the group ?

Name. the element, which has the highest electron gain enthalpy or electron affinity value in the periodic table.

How does atomic size varies along the period and down the group in s-block elements?

How does carbon gain four electrons?

Why noble gases have zero electron affinity values ?

How do the atomic radii vary in group and in period ? Give reasons for variation.

Why electron affinity of halogens is the highest ?