Question

how do physical property vary in a peroid and in a group in modern periodic table
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Answer 1

Answer:

Elements in the same period have the same number of electron shells; moving across a period (so progressing from group to group), elements gain electrons and protons and become less metallic. This arrangement reflects the periodic recurrence of similar properties as the atomic number increases.

Explanation:

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Answer 2

Elements in the same period have the same number of electron shell; moving across a period, elements gain electrons and protons and become less metallic. The arrangement reflects the periodic recurrence of similar properties as the atomic number increases.

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