Chemistry, 16.01.2020 02:31 josuealejandro9632

Which statement concerning elements is true?
1. different elements must have different numbers of isotopes.
2. different elements must have different numbers of neutrons.
3. all atoms of a given element must have the same mass number.
4. all atoms of a given element must have the same atomic number.

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Which statement concerning elements is true?
1. different elements must have different number...

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