Which of the following is/are true regarding isotopes?

Same number of protons

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Different number of electrons

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Same number of neutrons

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Different number of neutrons

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Solution

The correct options are
A Same number of protons
D Different number of neutrons
Elements that have same number of protons and different number of neutrons are called isotopes.
For example, the following are isotopes of hydrogen with number of electrons (e), protons (p) and neutrons (n):
Protium (1 e, 1 p, 0 n)
Deuterium (1 e, 1 p, 1 n)
Tritium (1 e, 1 p, 2 n)

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