When an Atom Loses an Alpha Particle

question 34

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

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