Periodic properties

Atomic size, valency, ionization enthalpy, electron gain enthalpy and electronegativity are the important periodic properties of elements. a) What do you mean by periodicity? b) Periodic properties are directly related to ͟ ͟ ͟͟͟

Match the element in Column-I with the periodic property in Column-II

Which of the following properties is a periodic property?

Which of the following properties is not a periodic property?

Prove that valency is a periodic property.

.................. is a relative periodic property.