객관식
Which ion does sulfur most commonly form in ionic compounds?
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2. Atoms & Elements
Ions
Multiple Choice
How many electrons are present in a Br⁻ ion?
A
34
B
35
C
36
D
37
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검증된 단계별 안내1
Identify the atomic number of bromine (Br), which represents the number of protons in a neutral atom. For bromine, the atomic number is 35.
Recall that in a neutral atom, the number of electrons equals the number of protons. Therefore, a neutral bromine atom has 35 electrons.
Understand that the Br⁻ ion has gained one extra electron compared to the neutral atom, because the negative charge indicates an excess of electrons.
Calculate the total number of electrons in the Br⁻ ion by adding one electron to the neutral atom's electron count: \(35 + 1\).
Conclude that the Br⁻ ion contains 36 electrons.
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