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Chemical Bonding and Molecular Structure

Short Answer Type

111.

Write the electronic configuration of $space straight N subscript 2 superscript plus$ ion and predict its magnetic behaviour.

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112.

Arrange the following molecular species in increasing order of stability:
$straight N subscript 2 comma space straight N subscript 2 superscript plus comma space straight N subscript 2 superscript minus comma space space straight N subscript 2 superscript 2 minus end superscript$

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113.

Explain why H-bonding does not exist in HCl, though chlorine is quite electronegative.

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114.

Define vander Waal's forces.

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115.

Is hydrogen bond weaker or stronger than the vander Waal’s forces?

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116.

Why HF has higher boiling point than HCl?

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Long Answer Type

117.

Define chemical bond. Why do atoms combine (Kossel-Lewis approach) and how do atoms combine (modes of chemical combination)?

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Short Answer Type

118. What are Lewis symbols?

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119.
What is Lewis structure of an atom and anion?

Lewis symbols or electron dot symbols (Lewis structure): According to the Lewis concept, the symbol of an element stands for the nucleus as well as electrons in the inner enthalpy shells (which are not involved in bond formation). The valence electrons are represented by dots near the symbol of the element. These symbols are known as Lewis symbols or electron dot symbols. In the case of ions, the ionic charge is also shown along with the symbol. For example, the Lewis structure of H, H⁺, Mg, Mg²⁺, F and F^– ions are shown as follows: