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shusha [124]
3 years ago
9

Elements in Group 18 are known

Chemistry
1 answer:
o-na [289]3 years ago
6 0

Answer:

C the number and placement of the electrons

Explanation:

Elements react with one another because they want to achieve a full valence shell of electrons. The noble gases already have a full valence shell of electrons, so they are unlikely to react with other elements.

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