In what way are the electron configurations of H, Li, Na, K, Rb, and Cs similar?

Question

In what way are the electron configurations of H, Li, Na, K, Rb, and Cs similar? More than one answer is possible. They belong to a mathematical progression in atomic number such that Z + 8 describes the next atomic number. They all have an unpaired electron in an s orbital. They all have an unpaired electron with a magnetic quantum number, ml = 0. They all have an unpaired electron with an angular momentum quantum number, l = 0. They all have an unpaired electron with a spin magnetic quantum number, ms = +1/2. They all have an unpaired electron with a spin magnetic quantum number, ms = - 1/2.

Explanation / Answer

The following is true They all have an unpaired electron in an s orbital They all have an unpaired electron with ml = 0 and they all have an unpaired electron with l = 0

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