What is 1st Period?

Asked Jul 24, 2023 Modified Jul 24, 2023 Viewed 0 times
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asked Jul 24, 2023 at 10:21
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1st Period contain two Elements, i.e., Hydrogen and Helium (atomic number 1 and 2). It is called very short period.
answered Jul 24, 2023 at 10:21

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