Multiple Choice
In terms of subatomic particles, how does one isotope of an element differ from another isotope of the same element?
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4. Atoms and Elements
Isotopes
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Which element has a most common isotope that contains 5 neutrons?
A
Nitrogen
B
Boron
C
Carbon
D
Oxygen
Verified step by step guidance1
Recall that the number of neutrons in an isotope is calculated by subtracting the atomic number (number of protons) from the mass number (total protons + neutrons): \(\text{Neutrons} = \text{Mass number} - \text{Atomic number}\).
Identify the atomic number of each element given: Nitrogen (7), Boron (5), Carbon (6), and Oxygen (8).
For each element, consider its most common isotope, which usually has a mass number close to twice the atomic number or the most stable isotope found naturally.
Calculate the number of neutrons for the most common isotope of each element by subtracting the atomic number from the mass number.
Compare the calculated neutron numbers to find which element's most common isotope contains exactly 5 neutrons.
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