An atom has $26$ electrons and its atomic weight is $56$. The number of neutrons in the nucleus of the atom will be

Chemical behaviour of an atom is determined by

Which one of the following groupings represents a collection of isoelectronic species?

When $\mathop a\limits^x U$ is converted into $\mathop b\limits^y P$,which of the following represents the correct decrease in the number of neutrons?

The electronic configuration of a divalent metal ion $M^{2+}$ is $2, 8, 14$ and its atomic mass is $58 \, a.m.u.$ What is the number of neutrons in its nucleus?

Which of the following has the maximum number of neutrons?