When an Atom Loses an Alpha Particle

question 45

Multiple Choice

When an atom loses an alpha particle,

• A)its atomic number decreases by 2 units and its mass number decreases by 4 units.
• B)its atomic number increases by 1 unit but its mass number remains unchanged.
• C)its mass number decreases by 1 unit but its atomic number remains unchanged.
• D)neither its atomic number nor its mass number changes.
• E)its atomic number increases by 2 units and its mass number increases by 4 units.

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