Question

What are isotopes?
tts Icon

Atoms of the same element but with a different mass
tts Icon

Atoms of the same element but with a different number of protons
tts Icon

Atoms of the same element but with a different number of electrons
tts Icon

Atoms of different elements with the same mass

Answer 1

Isotopes are **atoms of the same element but with a different mass**. This difference in mass is due to a varying number of neutrons in the atomic nucleus, while the number of protons (which defines the element) remains the same. Therefore, the correct option is:

**Atoms of the same element but with a different mass.**