The spectrum of helium is expected to be similar to that of
A.
$$H$$
B.
$$Na$$
C.
$$L{i^ + }$$
D.
$$H{e^ + }$$
Answer :
$$L{i^ + }$$
Solution :
The spectrum of an atom depends on the number of electrons present in it. Here, helium has two electrons, so the spectrum of $$L{i^ + }\left( {Z = 3} \right)$$ is similar to that of helium because both He and $$L{i^ + }$$ have two electrons.
Releted MCQ Question on Physical Chemistry >> Atomic Structure
Releted Question 1
The number of neutrons in dipositive zinc ion with mass number 70 is