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What defines an isotope?

• Atoms with the same number of neutrons

• Atoms with the same number of protons

• Atoms with different chemical properties

• Atoms with different numbers of electrons

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What is the purpose of using radioactive isotopes in food irradiation?

• To make food look fresher

• To change the taste of food

• To increase the weight of food

• To kill harmful bacteria

Which isotope is commonly used in smoke detectors?

• Carbon-14

• Americium-241

• Sodium-137

• Cobalt-60

What is a common use of radioactive isotopes in medicine?

• To create energy

• To change the color of medicines

• To make food last longer

• To diagnose diseases

Which isotope is used for sterilizing medical instruments?

• Cobalt-60

• Hydrogen-1

• Carbon-12

• Oxygen-16