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SS2 Second Term Chemistry Lesson Note – Nitrogen

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WEEK 6

TOPIC: NITROGEN

CONTENTS:

  1. General properties of nitrogen–group va elements, laboratory and industrial preparation of nitrogen,
  2. Properties and uses of nitrogen
  3. Compound of nitrogen – ammonia- laboratory and industrial preparation
  4. Properties and uses, test for ammonia, fountain experiment

PERIOD  1: GENERAL PROPERTIES OF NITROGEN – GROUP V ELEMENTS

Nitrogen and other group VA elements are non-metals and show two common valences of 3 and 5. They are electron acceptors and both form several acidic oxides. They also form similar hydrides and chloride e.g., Nitrogen and phosphorus form N2O3 and P4O6, N2O5 and P4O10, NH3, PH3, NCl3 and PCl3

Properties of VA elements

Property

 

Nitrogen

N

Phosphorous

P

Arsenic

As

Antimony

Sb

Bismuth

Bi

Atomic number 7 15 33 51 83
Outer electron configuration 2s22p6 3s23p3 3d104s2 4p3 4d104s25p3 4f15d106s26p3
Atomic mass 14.0067 30.9738 74.9216 121.75 208.980
Boiling point

Melting point

-196

-210

280w

44w

2.34r

610sr

817pgr

5.73gr

1380

630gr

6.7gr

1560

271

9.8

Density(gcm-3) 0.81 1.82w

W = white, gr = grey, p = 28 atmospheres, r = red, s = sublimes

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