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?

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