Question

Isotopes are the atoms of the same element which contain an equal number of ______.

Answer 1

we all know that atoms , particles, elements are the combination of proton, electron, neutron. Depending on the number of protons , neutrons and electrons i.e. atomic mass and atomic number, we differentiate some properties of elements like isotope and isomer.

Complete step-by-step solution:
Isotopes can be characterized as the variation of compound components that have a similar number of protons and electrons , however an alternate number of neutrons. Lets understand this concept with an example , Hydrogen has three numbers of isotopes, i.e. protium $\left( H_{1}^{1} \right)$, deuterium $\left( H_{1}^{2} \right)$, tritium $\left( H_{1}^{3} \right)$, they have different number of atomic mass but equal number of atomic number. The atomic number is $1$ for these three types of hydrogen atoms but number of neutron in $\left( H_{1}^{1} \right)$ is 1 , in $\left( H_{1}^{2} \right)$ is 2 , in $\left( H_{1}^{3} \right)$Is 3 . Now we can say that isotopes have equal numbers of atomic numbers but different numbers of atomic mass.
Therefore , the answer is : Isotopes are the atoms of the same element which contain an equal number of -atomic number.

Note: There are various types of application of isotopes in the medical field, Cobalt- $60$ is used in the treatment of cancer , Iodine - $131$ used in treatment of hyperthyroidism etc. Some isotopes like tritium are applied to the making of nuclear weapons , self powered lighting etc.