JAMB - Chemistry (2024 - No. 58)
When n = 3, the quantum number of an element is
3
9
18
21
Spiegazione
Quantum numbers are a set of numbers that describe the position and energy of an electron in an atom.
When the quantum number is equal to 3, the possible values for the azimuthal quantum number are 0, 1, and 2:
l=0, The resulting subshell is an "s" subshell.
l =1, The resulting subshell is a "p" subshell.
l =2: The resulting subshell is a "d" subshell.
The three possible sub-shells when n=3 are 3s, 3p, and 3d.