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Neko [114]
2 years ago
9

Match the element with its number of valence electrons. Match Term Definition: Helium Aluminum Fluorine Sodium A) 1 B) 2 C) 3 D)

7
Chemistry
2 answers:
wariber [46]2 years ago
5 0

Helium- 2

Aluminum- 3

Fluorine- 7

Sodium- 1

Hope I helped.

vampirchik [111]2 years ago
3 0

<u>Explanation:</u>

Valence electrons are defined as the electrons that are present in the outermost shell of an atom.

  • Helium is the 2nd element of the periodic table having electronic configuration of 1s^2

This element has 2 electrons in its outermost shell. So, it has 2 valence electrons. The correct answer is Option B.

  • Aluminium is the 13th element of the periodic table having electronic configuration of 1s^22s^22p^63s^23p^1

This element has 3 electrons in its outermost shell. So, it has 3 valence electrons. The correct answer is Option C.

  • Fluorine is the 9th element of the periodic table having electronic configuration of 1s^22s^22p^5

This element has 7 electrons in its outermost shell. So, it has 7 valence electrons. The correct answer is Option D.

  • Sodium is the 11th element of the periodic table having electronic configuration of 1s^22s^22p^63s^1

This element has 1 electron in its outermost shell. So, it has 1 valence electron. The correct answer is Option A.

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