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# An element X of group 15 exists as a diatomic molecule and combines with hydrogen at 773 K in presence of the catalyst to form a compound, ammonia which has a characteristic pungent smell.

**(a)** Identify the element X. How many valence electrons does it have?

**(b)** Draw the electron dot structure of the diatomic molecule of X. What type of bond is formed in it?

**(c)** Draw the electron dot structure for ammonia and what type of bond is formed in it?

(a) The element is

**Nitrogen.**It has 5 electrons in its outermost shell.(b) The electron dot structure of Nitrogen is shown below:

Nitrogen forms a

**triple covalent bond.**(c) The electron dot structure of Ammonia is shown below:

Ammonia forms

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