Atomic number of a nucleus is $Z$ and atomic mass is $M.$ The number of neutron is
$M - Z$
$M$
$Z$
$M + Z$
(a) $N = M – Z = $ Total no. of nucleons -no. of protons.
Define the different terms used for the composition of a nucleus.
In the nucleus of ${ }_{11} N a^{23}$, the number of protons, neutrons and electrons are
Which of the following pairs is an isobar
If the mass number of an atom is $A = 40$ and its electron configuration is $1{s^2},\;2{s^2},\;2{p^6},\;3{s^2},\;3{p^6}$, the number of neutrons and protons in its nucleus will be
The decay of a proton to neutron is :
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