What would be the atomic number of an element if its mass number is 28?

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Solution

The correct option is B 14
Mass number of an element is the sum of total number of protons and neutrons present in the nucleus of an atom. Here, the mass number of the element is 28, which means it has 14 protons and 14 neutrons.
Atomic number = Number of protons in the nucleus of the atom.
Hence, the atomic number of the element is 14.

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