객관식
Vanadium has an atomic number of 23. How many neutrons are present in the most abundant isotope of vanadium?
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2. Atoms & Elements
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Multiple Choice
How many neutrons are present in an atom of lithium-7?
A
0
B
7
C
3
D
4
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검증된 단계별 안내1
Identify the atomic number (Z) of lithium, which is the number of protons in the nucleus. For lithium, Z = 3.
Recognize that the number 7 in lithium-7 represents the mass number (A), which is the total number of protons and neutrons in the nucleus.
Use the formula to find the number of neutrons (N): \(N = A - Z\).
Substitute the known values into the formula: \(N = 7 - 3\).
Calculate the difference to find the number of neutrons in lithium-7.
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