Chemistry, asked by sm0375323, 3 months ago

what is the difference between atomic number first and last elements of periods 5 and 6.

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Answered by Itssana123
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Answer:

The atomic number or proton number of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus.

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