Question

From the following find out groups of isotopes, isobars and isotones:
${}_8^{16}O{,}_{19}^{39}K{,}_6^{14}C{,}_{92}^{239}U{,}_7^{14}N{,}_{20}^{40}Ca{,}_{92}^{238}U{,}_{32}^{77}Ge{,}_{33}^{77}As{,}_8^{18}O{,}_{32}^{76}Ge{,}_{34}^{78}Se$.

Answer 1

Isotopes have same atomic number but different atomic masses

${}_8^{16}O,{}_8^{18}O{}_{92}^{239}U{}_{92}^{238}U{}_{32}^{77}Ge{}_{32}^{76}Ge$ are isotopes.

Isobars have same atomic massed but different atomic number.

${}_6^{14}C{}_7^{14}N;{}_{32}^{77}Ge{}_{33}^{77}As$ are isobars

Isotones have same number of neutrons(atomic mass-atomic number)

${}_8^{16}O{}_6^{14}C;{}_{19}^{39}K{}_{20}^{40}Ca;{}_{33}^{77}As{}_{34}^{78}Se$ are isotones