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13 July, 07:08

Which quantity can vary among atoms of the same element?

A) mass number

B) atomic number

C) number of protons

D) number of electrons

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Answers (1)
  1. 13 July, 07:14
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    There is this thing called isotopes

    it means that atoms of the same element can have a different number of neutrons.

    if there is a change in the no. of neutrons, there will definitely be a change in the mass number.

    so the answer is A) mass number
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