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skelet666 [1.2K]
3 years ago
11

Please help me, Thank you!

Chemistry
1 answer:
Phantasy [73]3 years ago
3 0

Answer:

2

Explanation:

The atom shown in the image has 2 core electrons.

Electrons are the negatively charged particles within an atom. Therefore the total number of electrons surrounding the nucleus in the given specie is 7.

 So;

   We have 2 core electrons

   And 5 valence electrons

The core electrons are the inner orbital electrons.

The valence electrons are the outermost electrons.

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Answer:

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Explanation:Noble gases:

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