Question

matching question
match each principal energy level, at left, with the number of sublevels it contains, at right.
instructions
principal energy level 1
principal energy level 2
principal energy level 3
two sublevels
one sublevel
three sublevels
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Explanation:

In atomic structure, the number of sublevels in a principal energy level is equal to the principal quantum number \(n\). For \(n = 1\) (principal energy level 1), there is \(l=0\) (one sublevel, the \(s\) - sublevel). For \(n = 2\) (principal energy level 2), \(l = 0,1\) (two sublevels, \(s\) and \(p\)). For \(n=3\) (principal energy level 3), \(l = 0,1,2\) (three sublevels, \(s\), \(p\), and \(d\)).

Answer:

principal energy level 1 → one sublevel
principal energy level 2 → two sublevels
principal energy level 3 → three sublevels