Melting point of grp 1l5 increases from nitrogen to arsenic..but then

1.	Melting point of grp 1l5 increases from nitrogen to arsenic..but then decreases
Answer» Melting point INCREASES from NITROGEN To As because - -As we MOVE down the group the number of SHELLS increases and the Van der waals interactions increase. -But elements after Nitrogen have d orbital in them which LEADS to screening effects. Thus the force of attraction between the inner shells decreases which leads to a low melting point.

Melting point of grp 1l5 increases from nitrogen to arsenic..but then decreases

Answer»

Melting point INCREASES from NITROGEN To As because -

-As we MOVE down the group the number of SHELLS increases and the Van der waals interactions increase.

-But elements after Nitrogen have d orbital in them which LEADS to screening effects.

Thus the force of attraction between the inner shells decreases which leads to a low melting point.