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Leviafan [203]
4 years ago
15

The periodic table includes___periods.

Physics
1 answer:
Brums [2.3K]4 years ago
8 0

Answer:

Seven.

Explanation:

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.

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