Final answer:
Radioactive atoms harm the human body by emitting high-energy particles that can ionize molecules and cause damage to biomolecules, leading to cell malfunctions.
Explanation:
Radioactive atoms are harmful to the human body due to their ability to emit high-energy particles or electromagnetic waves. When this radiation interacts with living cells, it can ionize molecules, break chemical bonds, and cause serious damage to biomolecules. For example, alpha and beta particles from radioactive decay reactions possess high energies that can lead to cell malfunctions and potentially result in illness or death.
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