객관식
Why is a sodium ion (Na+) positively charged?
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2. Atoms & Elements
Ions
객관식
What is the charge on an atom after it gains two electrons during the formation of a bond?
A
+2
B
-1
C
0
D
-2
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검증된 단계별 안내1
Understand that atoms are neutral when they have an equal number of protons and electrons. Protons have a positive charge, and electrons have a negative charge.
Recognize that gaining electrons means adding negatively charged particles to the atom. Each electron carries a charge of -1.
Calculate the total charge gained by the atom when it gains two electrons. Since each electron has a charge of -1, gaining two electrons results in a charge of \(-1 \times 2\).
Express the result of the calculation using MathML: .
Conclude that the atom's charge after gaining two electrons is -2, indicating it has become an anion with a negative charge.
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