Question

give on example of isotope of 35cl17

isobar of 40ar18

isotone of 14c6

Answer 1

Isotopes have same no. of proton and different mass number(p+n) so the other isotope for chlorine is ${}_{17}{}^{37}Cl$
Similarly, isobars have same mass no. (p+n)and different no. of protons i.e. no. of neutrons varies in the two. So, the isobar of ​ Ar is ${}_{20}{}^{40}Ca$
Now, the isotones have same no, of neutrons and thus both the mass no. (p+n) and atomic no. varies but still the species have same no. of neutrons for ex : the isotones are:
${}_6{}^{14}C,{}_8{}^{16}O$
Both the soecies have 8 neutrons.