SATHEE: Chapter 04 Structure of The Atom Questions-03

Chapter 04 Structure of The Atom Questions-03

Questions

1. Name the three sub-atomic particles of an atom.

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Answer

The three sub-atomic particles of an atom are:

(i) Protons

(ii) Electrons, and

(iii) Neutrons

2. Helium atom has an atomic mass of $4 u$ and two protons in its nucleus. How many neutrons does it have?

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Answer

Number of neutrons $=$ Atomic mass - Number of protons Therefore, the number of neutrons in the atom $= 4 - 2 = 2$

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Chapter 04 Structure of The Atom Questions-03

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