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

How does electron affinity vary along a period ?

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

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

How does atomic radius vary down a group and along a period?

How does electron affinity vary down a group ?

How does bond length vary with bond order?