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NCERT Exemplar Solutions Class 9 Science Solutions for Structure of the Atom - Exercise in Chapter 4 - Structure of the Atom

Question 21 Structure of the Atom - Exercise

Which of the following statement is always correct?

(a) An atom has an equal number of electrons and protons.

(b) An atom has an equal number of electrons and neutrons.

(c) An atom has an equal number of protons and neutrons.

(d) An atom has an equal number of electrons, protons, and neutrons.

Answer:

The answer is (a) An atom has an equal number of electrons and protons.

Explanation:

An atom is electrically neutral because the number of protons is always equal to a number of electrons. Hence option a) is right.

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