객관식
An atom's mass number is 13 and its atomic number is 6. How many neutrons are in its nucleus?
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2. Atoms & Elements
Isotopes
객관식
An atom of carbon-14 has 6 protons. How many neutrons does this atom have?
A
6 neutrons
B
14 neutrons
C
12 neutrons
D
8 neutrons
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검증된 단계별 안내1
Identify the atomic number of carbon, which is the number of protons in the nucleus. For carbon, this is 6 protons.
Understand that the mass number of an isotope is the sum of protons and neutrons in the nucleus. For carbon-14, the mass number is 14.
Use the formula: \( \text{Number of Neutrons} = \text{Mass Number} - \text{Number of Protons} \).
Substitute the known values into the formula: \( \text{Number of Neutrons} = 14 - 6 \).
Calculate the number of neutrons by performing the subtraction to find the result.
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