Why is calcium harder than potassium?

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asked Aug 8, 2019 71.3k views

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AminMal · Answer 1 · 2019-08-15T04:54:14+0000

Because calcium atoms have smaller radii than potassium atoms since calcium atoms have a greater nuclear charge. Each calcium atom will be closer to the delocalized electrons. Thus, the bonds in calcium will be stronger than that in potassium.

Why is calcium harder than potassium?

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