Isotopes and isobars — task. Chemistry CBSE Live product, Class 9 (2026-27).

Choose the correct answer.

Answer variants:

Isotone

Isotope

Isobar

{}_{18}^{40}{Ar}, {}_{19}^{40}K

{}_{6}^{12}C, {}_{6}^{13}C

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5. Isotopes and isobars