Multiple Choice
Which two ions are present in the greatest abundance in table salt (NaCl)?
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2. Atoms & Elements
Ions
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What is the charge on a sulfide ion formed when sulfur gains electrons to achieve a stable electron configuration?
A
1-
B
2+
C
2-
D
1+
Verified step by step guidance1
Recall that sulfur (S) is in group 16 of the periodic table and has 6 valence electrons in its outer shell.
To achieve a stable electron configuration similar to the nearest noble gas (argon), sulfur needs to gain enough electrons to complete its octet, which means having 8 valence electrons.
Calculate the number of electrons sulfur must gain: 8 (stable octet) - 6 (valence electrons) = 2 electrons gained.
Since electrons carry a negative charge, gaining 2 electrons results in a charge of 2- on the ion.
Therefore, the sulfide ion formed when sulfur gains electrons has a charge of 2-.
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