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5 June, 22:39

How do elements change as you go down a group in the periodic table?

A. The average atomic mass decreases.

B. The atomic number increases.

C. The atoms become more metallic.

D. The number of valence electrons increases.

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Answers (1)
  1. 6 June, 02:05
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    D. The number of valence electrons increases.
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