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The atomic number and mass number of calcium are 20 and 40 respectively. Deduce the number of neutron present in the calcium nucleus.

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The atomic number and mass number of calcium are 20 and 40 respectively. Deduce the number of neutron present in the calcium nucleus.

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There are 20 neutrons in the nucleus of calcium. [Note: The number of neutrons N = A – Z = 40 – 20 = 20]

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