Question

of the following elements below, which has an electron located in a \p\ orbital?
li
s
h
he

Explanation:

Step1: Write electron configurations

• \(Li\) (atomic number \(3\)): \(1s^{2}2s^{1}\)
• \(S\) (atomic number \(16\)): \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{4}\)
• \(H\) (atomic number \(1\)): \(1s^{1}\)
• \(He\) (atomic number \(2\)): \(1s^{2}\)

Step2: Check for \(p\) - orbital electrons

• For \(Li\): Only \(s\) - orbital electrons (\(1s\) and \(2s\))
• For \(S\): Has \(2p\) and \(3p\) electrons
• For \(H\): Only \(1s\) electron
• For \(He\): Only \(1s\) electrons

Answer:

\(S\)