Question

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

Mar jao sab ke sab​

Answer 1

Answer:

The number of protons is half of the neutrons.

Explanation:

and, number of electrons= number of protons= number of neutrons = 20. Therefore , option B is also correct . The number of nucleons which is referred to as the mass number of an atom is 40 in case of calcium atom which is double the number of neutrons 

Answer 2

Answer:

20

Explanation:

in calcium atom,

The atomic number = number of protons = 20

mass number = 40

number of neutrons =mass number - number of protons

that is , 40−20= 20

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