Multiple Choice
How many neutrons are contained in the isotope molybdenum-96 (Mo-96)?
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2. Atoms & Elements
Isotopes
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Which phrase best describes the element carbon-14?
A
A molecule containing 14 carbon atoms
B
An isotope of carbon with 6 protons and 8 neutrons
C
A stable isotope of carbon with 7 protons and 7 neutrons
D
An ion of carbon with 14 electrons
Verified step by step guidance1
Understand that carbon-14 refers to a specific form of the element carbon, characterized by its atomic structure.
Recall that the atomic number of carbon is 6, which means every carbon atom has 6 protons.
Recognize that the number 14 in carbon-14 represents the mass number, which is the sum of protons and neutrons in the nucleus.
Calculate the number of neutrons by subtracting the number of protons from the mass number: \(\text{neutrons} = 14 - 6\).
Conclude that carbon-14 is an isotope of carbon with 6 protons and 8 neutrons, distinguishing it from other isotopes by its neutron count.
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