What atoms with the same atomic number but a different atomic mass.?

Answer 1

Isotopes.

Isotopes are atoms that have the same atomic number (proton number) but differ in the number of neutrons (resulting in different atomic mass).

For instance, carbon-12, carbon-13, and carbon-14 are all considered isotopes of carbon because they are all carbon atoms with the same atomic number, but different mass numbers (12, 13, and 14) due to the different number of neutrons in each atom.

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Answer 2

Jeremiah Adams

Isotopes are atoms that have the same atomic number but a different atomic mass.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.