Chemistry
Give reasons:
Nitrogen molecule has no lone pair of electrons, while ammonia molecule has one lone pair.
Answer
In a nitrogen molecule (N2), each nitrogen atom shares three pairs of electrons with the other nitrogen atom and also retains one lone pair. In ammonia (NH3), nitrogen forms three covalent bonds with hydrogen atoms and retains one lone pair. Hence, the statement that nitrogen molecule has no lone pair is not chemically correct. Each nitrogen atom in N2 has one lone pair.
Related Questions
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Mass number is slightly less than the actual atomic mass.
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Noble gases are almost inert to chemical reactions.
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The octet & duplet arrangement seem to represent stability.
Match Column A with the correct reason in Column B.
Column A Column B (a) 2713Al 1) Has 18 electrons in M shell (b) 11H 2) Has 7 electrons in M shell (c) Kr [Krypton] 3) Has 27 nucleons in its nucleus (d) 3717Cl 4) Has 8 electrons in M shell (e) 3919K 5) Has no neutrons in its nucleus