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15 votes
Which of the following statements is FALSE?

The first electron shell of an atom is filled when it contains eight electrons.
The number of electrons in the outer shell of an atom determines the atom's chemical properties.
Ο Ο Ο Ο
An oxygen atom has six electrons in its valence (outer) shell; therefore, it is considered unstable
Inert atoms do not readily participate in chemical reactions

2 Answers

8 votes
The first one, “the first electron shell of an atom is filled when it contains eight electrons” is incorrect. The first shell can only contain 2 electrons to be considered filled or full, the rest from shells 2-7 can only contain 8 electrons to be considered filled or full. You can only get another shell when the last one is completely full.
User VladN
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4.3k points
6 votes
The one that is false is number 1 the first election shell of an atom is filled when it contains eight electrons

The first election shell can only hold two and all the other ones can hold eight
User Adsun
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3.9k points