객관식
How many protons are present in a neutral atom of aluminum?
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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 beryllium (Be) atom?
A
6
B
4
C
2
D
9
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검증된 단계별 안내1
Identify the element in question, which is beryllium (Be).
Recall that the number of protons in an atom is equal to the atomic number of the element.
Look up the atomic number of beryllium on the periodic table, which is the number of protons in its nucleus.
Note that the atomic number of beryllium is 4, meaning it has 4 protons in its nucleus.
Therefore, the number of protons in a beryllium atom is 4.
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