What is the mass number of element X which has 8 electrons and 8 neutrons?
16

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Solution

The correct option is A 16
Mass number is the total number of protons and neutrons present in the nucleus of an atom. It is denoted by A.

For the given element X,
Number of electrons = 8
Number of electrons = Number of protons
Number of neutrons = 8
Mass number = Number of protons + number of neutrons
Therefore, mass number = 16

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What is the mass number of element X which has 8 electrons and 8 neutrons?16

What is the mass number of element X which has 8 electrons and 8 neutrons?
16