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ICSE Class 9 Chemistry Question 15 of 39

Atomic Structure and Chemical Bonding — Question 27

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Question 13

What are nucleons? How many nucleons are present in phosphorus? Draw its structure.

Answer

Constituents of the nucleus are called nucleons, i.e. protons and neutrons.

3115P has atomic number 15, hence it has 15 protons.

Mass number 31, hence number of neutrons = 31 - 15 = 16

Therefore, number of nucleons are p + n = 15 + 16 = 31.

Structure of Phosphorus is shown in the diagram below:

How many nucleons are present in phosphorus? Draw its structure. Atomic Structure, Concise Chemistry Solutions ICSE Class 9