How many types of radioactive decay are said to occur in nature?
AFifteen types
BThree types
CSeven types
DEleven types
Answer & Solution
Correct answer: B. Three types
1. Radioactive decay is classified by what the nucleus emits.
2. The emissions are a helium nucleus, an electron or positron, or a photon.
3. Three types of radioactive decay occur in nature.
4. They are alpha, beta and gamma decay.
_Source: NCERT Class XII Physics Part II, Ch 13 'Nuclei'_
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