Multiple Choice
How are Carbon-13 and Nitrogen-15 respectively different from the more abundant isotopes Carbon-12 and Nitrogen-14? Carbon-13 and Nitrogen-15 _______________:
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2. Cell Chemistry & Cell Components
Isotopes
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
In which of the following will isotopes of an element always differ?
A
Atomic number
B
Number of electrons
C
Number of protons
D
Atomic mass
Verified step by step guidance1
Understand that isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.
Recall that the atomic number of an element is defined by the number of protons in its nucleus, which remains constant across isotopes of the same element.
Recognize that the number of electrons in a neutral atom is equal to the number of protons, so isotopes of an element typically have the same number of electrons.
Identify that the atomic mass of an isotope is the sum of the number of protons and neutrons in the nucleus, which varies among isotopes due to the different number of neutrons.
Conclude that isotopes of an element will always differ in their atomic mass, as this is the characteristic that changes with the number of neutrons.
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