Define catenation. How it vary it nitrogen family. 

Define electronegativity. How does it vary in the periodic table?

How do plants get nitrogen?

Assertion : Catenation tendency is weaker in nitrogen. Reason : Nitrogen exists as diatomic gas.

Define water potential. How it is measured?

Define the term "Catenation”.

Give decreasing order of catenation of carbon family .

Assertion (A) : The atomic radii of the electrons of oxygen family are smaller than the atomic radii of corresponding electrons of the nitrogen family Reason (R ) : The members of oxygen family are all more electronegative and thus have lower value of nuclear than those of the nitrogen family

The basic character of hydrides of nitrogen family............ on moving down the group.

How would you account for the following : (i) The electron gain enthalpy with negative sign is less for oxygen than that for sulphur. (ii) Phosphorus shows greater tandency for catenation than nitrogen. (iii) Fluorine never acts as the central atom in polyatomic interhalogen compounds.

Name all the elements of nitrogen family.