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The smallest class of the Periodic Table would be the semi-metals, or metalloids. The second biggest group would be the nonmetals. The largest group would be the metals.

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15y ago
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11y ago

The first period has only 2 elements - H and He.

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11y ago

Period 1 is the shortest with 2 elements.

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Q: What is the smallest class of the periodic table?
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