Question

If highest magnetic quantum number of a given atom is represented by $3$, then what will be its principal quantum number?

• A. $2$
• B. $3$
• C. $4$
• D. $5$

Answer 1

The correct option is C $4$

If the magnetic quantum number of a given atom is represented by $-3$, then its principal quantum number will be 4.
For a given value of l, $m=-l,....0...+l$
When $m=-3$, $l=3$
For given valu of n, l can have values from 0 to n-1.
When $l=3$, $n=4$ so that $n-1=4-1=3$