Atomic Structure MCQ Question with Answer

Question No : 43
Frequency of the wave having wave number $20000 c{m}^{-1}$ is

Question No : 44
A dipositive ion $Z^{++}$ has $2e^{-}$ in the K shell, 8 e~ s in the L shell and $8e^{-}$ in the M shell. Atomic number of Z is

Question No : 45
The number of unpaired electrons in a chromic ion $C{r}^{+3}$ (atomic number 24) is

Question No : 46
Wave number is defined as

Question No : 47
The interrelationship between matter and energy was given by

Question No : 48
Which elements is represented by the following electronic configuration?

Question No : 49
The ion that is isoelectronic with CO is