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Chemical Bonding And Molecular Structure

Question
CBSEENCH11008075
Wired Faculty App

Stability of the species Li2, Li2− and Li2+ increases in the order of:

  • Li2 < Li2+ < Li2-

  • Li2− < Li2+ < Li2 

  • Li2< Li2− < Li2+

  •  Li2− <Li2< Li2+

Solution

B.

Li2− < Li2+ < Li2 

Li subscript 2 left parenthesis 6 right parenthesis space equals space straight sigma 1 straight s squared space straight sigma asterisk times 1 straight s squared straight sigma 2 straight s squared straight B. straight O space equals space fraction numerator 4 minus 2 over denominator 2 end fraction space equals space 1 Li subscript 2 superscript plus space left parenthesis 5 right parenthesis space equals space straight sigma 1 straight s squared space straight sigma asterisk times 1 straight s squared straight sigma 2 straight s to the power of 1 straight B. straight O space equals space fraction numerator 3 minus 2 over denominator 2 end fraction space equals 0.5 Li subscript 2 superscript minus space left parenthesis 7 right parenthesis space space equals space space straight sigma 1 straight s squared space straight sigma asterisk times 1 straight s squared straight sigma 2 straight s squared straight sigma asterisk times 2 straight s to the power of 1 straight B. straight O space equals space fraction numerator 4 minus 3 over denominator 2 end fraction space equals space 0.5
Li2+ is more stable than Li2− because Li2− has more numbers of antibonding electrons.

Some More Questions From Chemical Bonding and Molecular Structure Chapter

Name the conditions for the formation of an ionic bond between two atoms.

What is crystal lattice?

What is electrovalency?

What bond is present in MgCl2 molecules?

Write Lewis dot symbols for atoms of the elements Mg, Na, B, O, N, Br.

Draw the Lewis structure for the ionic compound by aluminium and fluorine.

Two elements A and B have the electronic configuration as:
A = 1s22s22p63s2 and B = 1s22s22p5
Write the empirical formula of the substance containing A and B.

What type of bonding would you expect between:
(i) a metal and a non-metal
(ii) a non-metal and another non-metal?

Give reasons in one or two sentences for the observation that in their compounds non-metals form anions and not cations.

Out of Na and K, which will form a more stable ionic bond?

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