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Simpleuser · Answer 1 · 2023-07-25T01:09:19+0000

Explanation:

Firstly, we need to write out the electronic configuration of potassium and calcium atom

$\begin{gathered} _(19)K=1s^22s^22p^63s^23p^64s^1 \\ _(20)Ca=1s^22s^22p^63s^23p^64s^2 \end{gathered}$

According to the above configuration, we observe that potassium has one valence electron and calcium has two valence electrons. This implies that potassium belongs to group 1 and calcium belongs to group 2.

In addition, each atom in calcium has a stronger attraction to the delocalized electrons than potassium. Also, more energy is required to break the bond in calcium. Hence, calcium will have high melting point than potassium.

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