Multiple Choice
What is the atomic number of an ion with a +1 charge that contains 18 electrons?
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- 1. Intro to General Chemistry3h 47m
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2. Atoms & Elements
The Atom
Multiple Choice
How many electrons are present in a neutral atom of lithium?
A
3
B
1
C
7
D
5
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Verified step by step guidance1
Recall that a neutral atom has an equal number of protons and electrons.
Identify the atomic number of lithium from the periodic table, which represents the number of protons in the nucleus.
For lithium, the atomic number is 3, meaning it has 3 protons.
Since the atom is neutral, the number of electrons must also be 3 to balance the positive charge of the protons.
Therefore, the number of electrons in a neutral lithium atom is equal to its atomic number, which is 3.
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