객관식
Which statement correctly describes the difference in electric charge between protons and electrons in an atom?
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- 1. Intro to General Chemistry3h 46m
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2. Atoms & Elements
The Atom
Multiple Choice
How many protons are present in the nucleus of a lithium (Li) atom?
A
6
B
1
C
7
D
3
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검증된 단계별 안내1
Recall that the number of protons in the nucleus of an atom is given by the atomic number of the element.
Identify the element in question, which is lithium (Li).
Look up the atomic number of lithium on the periodic table; this number represents the number of protons.
Note that the atomic number of lithium is 3, meaning it has 3 protons in its nucleus.
Therefore, the number of protons in a lithium atom is 3.
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