# Chapter 6 - Electronic Structure of Atoms - Exercises: 6.57c

$n=4$ and $l=3$.

#### Work Step by Step

*NOTES TO REMEMBER: In an orbital designation, - the number represents the value of $n$. - the letter represents the value of $l$, according to the following rule: $l=0$, the letter used is $s$. $l=1$, the letter used is $p$. $l=2$, the letter used is $d$. $l=3$, the letter used is $f$. The orbital designation is $4f$. Therefore, $n=4$ and $l=3$.

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