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Which consequence results when Cobalt-60 undergoes beta decay?

A)Nickel-60 forms and emits photons
B)Iron-56 forms after alpha emission
C)Cobalt-59 forms and emits positrons
D)New isotope with same proton-number

💡 Explanation

Exposure to beta radiation causes an unstable cobalt nucleus to undergo beta decay via **neutron conversion to a proton**, therefore emitting an electron and antineutrino, yielding stable nickel-60 and gamma photons, rather than alpha decay or positron emission.

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