Write the trends in atomic radius, metallic nature and ionisation potential of group VA elements. 

The first ionisation potential of which of the element is highest

Write the names and symbols of the group 15(VA) elements.

How does the ionisation energy of 1st group elements very ?

What is the nature of the compounds of group 15 elements?

What are the various factors due to which the ionisation enthalpy of the main group elements tends to decrease down a group?

Discuss the trends in chemical reactivity of group 15 elements.

Discuss and compare the trend in ionisation enthalpy of the elements of group 1 with those of group 17 elements.

Write the trend of variation in atomic and ionic radii among the alkali metals.

Explain with reasons the trends in metallic and non-metallic character down a group.

State the factors which influence or affect the ionisation potential of elements in a periodic table.