2. An unstable nucleus loses the most mass if the nucleus emits
A. positron
B. gamma ray
Calpha particle.
D. beta particle



Answer :

Final answer:

Beta decay involves the emission of a beta particle, changing a neutron to a proton within the nucleus.


Explanation:

Beta decay involves the emission of a beta particle, which is essentially an electron ejected from the nucleus during radioactive decay. This process converts a neutron to a proton within the nucleus, leading to an increase in the atomic number by one while the mass number remains the same. An example of beta decay is seen in the decay of Carbon-14 into Nitrogen-14.


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