객관식
Which types of atoms typically form anions, and where are these atoms generally located on the periodic table?
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2. Atoms & Elements
Ions
객관식
Which of the following is an example of an ion?
A
CO_2
B
O_2
C
H_2O
D
Na^+
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검증된 단계별 안내1
Understand what an ion is: an ion is an atom or molecule that has gained or lost one or more electrons, resulting in a net electrical charge.
Examine each option to determine if it carries a charge: CO_2 (carbon dioxide) is a neutral molecule with no net charge.
O_2 (oxygen gas) is also a neutral molecule composed of two oxygen atoms sharing electrons equally, so it has no charge.
H_2O (water) is a neutral molecule with no net charge, composed of hydrogen and oxygen atoms bonded covalently.
Na^+ (sodium ion) has lost one electron, giving it a positive charge, which makes it an example of an ion.
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