Chapter 4

NCERT
Class 9
Science
Solutions
1. If number of electrons in an atom is 8 and number of protons is also 8, then

Question:

If number of electrons in an atom is 8 and number of protons is also 8, then

(i) What is the atomic number of the atom?

(ii) What is the charge on the atom?

Answer:

(i) Atomic number = Number of protons = 8

(ii) Number of protons = 8

Positive charge = 8

Number of electrons = 8

Negative charge = 8

Net charge = 8 + (–8)

= 0

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