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Why is Mg smaller than Cl?

Updated: 10/18/2022
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10y ago

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Magnesium isn't smaller than chlorine, it's larger. The atomic radius for magnesium is 145 pm and the atomic radius for chlorine is 79 pm.

Both magnesium and chlorine are in the third period of the Periodic Table. The trend for atomic radius is that the elements generally get smaller as you move from left to right across the table in the same period.

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10y ago
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Q: Why is Mg smaller than Cl?
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