Multiple Choice
Which formula is used to calculate the percentage abundance of an isotope in a sample?
2. Atoms & Elements
Isotopes
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Which of these refers to atoms with the same atomic number but different atomic masses?
A
Isotopes
B
Ions
C
Isomers
D
Allotropes
Verified step by step guidance1
Identify the key terms in the question: atomic number and atomic mass.
Recall that the atomic number is the number of protons in an atom, which defines the element.
Understand that atomic mass is the sum of protons and neutrons in the nucleus of an atom.
Recognize that isotopes are atoms of the same element (same atomic number) that have different numbers of neutrons, resulting in different atomic masses.
Differentiate isotopes from ions (which are charged atoms), isomers (which are compounds with the same formula but different structures), and allotropes (which are different forms of the same element in the same physical state).
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