(a(i))[1]
Which electronic configuration corresponds to a sodium atom?
(a(ii))[1]
Which electronic configuration represents an atom of a reactive non-metal element?
(a(iii))[1]
Which electronic configuration corresponds to an atom with proton (atomic) number 12?
(a(iv))[1]
Which electronic configuration represents an atom of the noble gas used in balloons?
(a(v))[1]
Which electronic configuration represents an atom that forms a noble gas electronic configuration when it gains two electrons?
(b(i))[1]
One chlorine isotope is shown by the symbol $^{37}_{17}\text{Cl}$. Deduce the number of neutrons in one atom of this chlorine isotope.
(b(ii))[1]
Chlorine has diatomic molecules. What does the term diatomic mean?