Which of the following statements about valence electrons and the periodic table is true?

AThe number of valence electrons decreases from left to right across each period. B) The number of valence electrons increases from top to bottom within each group.
CAll of the elements in group 9 have nine valence electrons.
DElements with the most valence electrons are in group 18.

Aincorrect. They increase.
b) incorrect. Each group has the same number of valence electrons.
c) incorrect. You can't have 9 valence electrons.
d) Correct. Group 18 (known as the noble gases) have 8 valence electrons (they're already balanced)

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abhishekprakash2625 abhishekprakash2625 · Answer 2 · 2021-10-05T10:56:42-04:00

Answer:

The correct answer is D) Elements with the most valence electrons are in group 18.

Explanation:

Valency is defined as the number of electrons present in the outermost shell. it is also defined as the number of electrons available for the bond with the other element.

The valency remains the same along with the group and varies in the period. But the group 18 has the maximum number of valency elecrons in their outermost shell.

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