Question

​Which of the given relations about the below elements are correct.

$a{)}^{12}Cb{)}^{14}Cc{)}^{14}Nd{)}^{16}O$

• A. a and b are isotopes
• B. b and c are isobars
• C. b and d are isotones
• D. c and d are isobars

Answer 1

Answer: (A), (B), (C)

b and d are isotones

Nuclei with same number of protons but different number of neutrons are called Isotopes.
Nuclei with same number of neutrons but different number of protons are called Isotones.
Nuclei with same mass number are called Isobars.
$\begin{array}{cccc}Element& Neutronno.& Protonno.& Massno.\\ {}^{12}C& 6& 6& 12\\ {}^{14}C& 8& 6& 14\\ {}^{14}N& 7& 7& 14\\ {}^{16}O& 8& 8& 16\end{array}$
${}^{12}Cand{}^{14}C$ have same Proton number but different Neutron number. So, they are isotopes
${}^{14}Nand{}^{14}C$ have same mass number. So, they are isobars.
${}^{14}Cand{}^{16}O$ have same number of neutrons. So, they are isotones.