Question

In a neutral atom there are 12 electrons and its mass number is 24, then the number of neutrons is

Answer 1

Answer:

12

Explanation:

atomic number (z) =12

mass number (A) =24

no. of neutrons =A-z=12

Answer 2

Answer:

There are 12 number of neutrons in the atom

Explanation:

• Mass number of an atom is because of neutrons and protons present in the nucleus.
• Also for a neutral atom the number of protons are equal to number of electrons.
• Thus, number of protons of this atom will also be 12.
• Number of neutrons = mass number - protons number = 24-12 = 12.
• Thus the number of neutrons are calculated to be 12.

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