객관식
Which set correctly lists the three main subatomic particles in an atom?
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4. Atoms and Elements
Subatomic Particles (Simplified)
객관식
How many protons are in a neutral lithium atom?
A
3
B
6
C
7
D
10
검증된 단계별 안내1
Recall that the number of protons in an atom is equal to its atomic number, which uniquely identifies the element.
Identify the element given in the problem: lithium. Lithium's atomic number is 3.
Understand that a neutral atom has an equal number of protons and electrons, but the number of protons does not change regardless of charge.
Therefore, the number of protons in a neutral lithium atom is the same as its atomic number, which is 3.
Conclude that the correct answer is 3 protons for a neutral lithium atom.
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