1. What are the "periods of the Periodic Table?

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asked Oct 20, 2021 234k views

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Salt · Answer 1 · 2021-10-24T23:44:11+0000

A period is a horizontal row of the periodic table. There are seven periods in the periodic table, with each one beginning at the far left. A new period begins when a new principal energy level begins filling with electrons. Period 1 has only two elements (hydrogen and helium), while periods 2 and 3 have 8 elements.

1. What are the "periods of the Periodic Table?

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