Multiple Choice
Which of the following is the correct chemical formula for the chromate ion?
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3. Chemical Reactions
Polyatomic Ions
Multiple Choice
Which of the following is the correct chemical formula for the ammonium ion?
A
NH_3
B
NH_2^+
C
NH_4^+
D
NO_3^-
Verified step by step guidance1
Understand that an ion is a charged species formed when atoms or groups of atoms gain or lose electrons.
Recall that the ammonium ion is a polyatomic ion formed by the combination of ammonia (NH_3) with an additional hydrogen ion (H^+).
Recognize that ammonia (NH_3) is neutral, and when it gains a proton (H^+), it forms the ammonium ion with a positive charge.
Write the chemical formula for the ammonium ion by adding one hydrogen atom to NH_3 and indicating the positive charge: \(NH_4^+\).
Compare the given options and identify that \(NH_4^+\) correctly represents the ammonium ion, while \(NH_3\) is neutral ammonia, \(NH_2^+\) is not the ammonium ion, and \(NO_3^-\) is the nitrate ion.
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