Occurrence, Physical properties | p-Block Elements-II | Chemistry - Group 15 (Nitrogen group) elements | 12th Chemistry : UNIT 3 : p-Block Elements-II
Chapter: 12th Chemistry : UNIT 3 : p-Block Elements-II
Group 15 (Nitrogen group) elements
p-BLOCK
ELEMENTS – II
INTRODUCTION
We have already learnt
the general characteristics of p-block elements and the first two group namely
icosagens (boron group) and tetragens (carbon group) in the previous unit. In
this unit we learn the remaining p-block groups, pnictogens, chalcogens,
halogens and inert gases.
Group
15 (Nitrogen group) elements:
Occurrence:
About 78 % of earth
atmosphere contains dinitorgen (N2) gas. It is also present in earth
crust as sodium nitrate (Chile saltpetre) and potassium nitrates (Indian
saltpetre). The 11th most abundant element phosphorous, exists as phosphate
(fluroapatite, chloroapatite and hydroxyapatite). The other elements arsenic,
antimony and bismuth are present as sulphides and are not very abundant.
Physical properties:
Some of the physical
properties of the group 15 elements are listed below
Table 3.1 Physical properties of group 15 elements
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