Question

WHAT IS 3 PERIOD IN CHEMISTRY?

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Answer 1

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The third period contains eight elements: sodium, magnesium, aluminium, silicon, phosphorus, sulfur, chlorine, and argon. ... All of the period 3 elements occur in nature and have at least one stable isotope.

Answer 2

Answer:

The third period contains eight elements: sodium, magnesium, aluminium, silicon, phosphorus, sulfur, chlorine, and argon. The first two, sodium and magnesium, are members of the s-block of the periodic table, while the others are members of the p-block.