9 - 3.2: Isotope Modeling Independent Practice

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The mass number of an atom is the sum of its protons and neutrons. What is the mass number of each isotope of hydrogen shown below?

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Deuterium is the isotope of hydrogen. The mass number of the deuterium isotope is

• 2
• 1
• 3
• 4

A tritium has _____ neutrons and a mass of 3 amu.

• 2
• 5
• 7
• 4

All three of the isotopes of hydrogen have _____ proton(s).

• 1
• 2
• 3
• 4