객관식
Which element has 13 protons in its nucleus?
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2. Atoms & Elements
The Atom
객관식
How many neutrons are present in the most abundant isotope of boron?
A
7
B
11
C
6
D
5
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검증된 단계별 안내1
Identify the atomic number (Z) of boron, which is the number of protons in the nucleus. For boron, Z = 5.
Determine the mass number (A) of the most abundant isotope of boron. The most common isotope of boron has a mass number of 11.
Recall that the number of neutrons (N) in an isotope is given by the difference between the mass number and the atomic number: \(N = A - Z\).
Substitute the values for the most abundant isotope: \(N = 11 - 5\).
Calculate the number of neutrons to find the answer.
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