Answer:
radioactive ✶ ✶ ✶ ✶ ✶ ✶ ✶
Explanation: ✶ ✶ ✶ ✶ ✶ ✶ ✶ ✶
An atom that emits energy because of nuclear decay is considered ✶✶ ✶ ✶. ✶ ✶ ✶ ✶✶
l radioactive l
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