The atomic mass number of an element is qquad | vedclass

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(C) The atomic mass number $(A)$ is defined as the sum of the number of protons $(Z)$ and the number of neutrons $(N)$ in the nucleus,so $A = Z + N$.S

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equal to or greater than its atomic number

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(C) The atomic mass number $(A)$ is defined as the sum of the number of protons $(Z)$ and the number of neutrons $(N)$ in the nucleus,so $A = Z + N$.Since the number of neutrons $(N)$ is always greater than or equal to zero,the atomic mass number $(A)$ must be greater than or equal to the atomic number $(Z)$.For the simplest element,Hydrogen $(_{1}^{1}H)$,the number of neutrons is $0$,so $A = Z = 1$.For all other elements,the number of neutrons is greater than zero,making $A > Z$.Therefore,the atomic mass number is always equal to or greater than the atomic number.

The atomic mass number of an element is $\qquad$ .

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