Multiple Choice
If an atom has a charge of 2+, what does this indicate about the atom?
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2. Atoms & Elements
Ions
Multiple Choice
How many electrons are present in a Rb^+ ion?
A
37
B
35
C
38
D
36
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Verified step by step guidance1
Identify the atomic number of rubidium (Rb), which represents the number of protons in the atom. For Rb, the atomic number is 37.
Recall that a neutral rubidium atom has an equal number of electrons and protons, so it initially has 37 electrons.
Understand that the Rb^+ ion has a positive charge of +1, meaning it has lost one electron compared to the neutral atom.
Calculate the number of electrons in the Rb^+ ion by subtracting one electron from the neutral atom's electron count: \$37 - 1$.
Conclude that the Rb^+ ion contains 36 electrons.
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