A) innermost electron orbit
B) a stable nucleus
C) outermost electron orbit
D) radioactive nucleus
Correct Answer: D
Solution :
\[\text{ }\!\!\beta\!\!\text{ -}\]emission takes place from a radioactive nucleus as\[_{15}^{32}P\xrightarrow[{}]{-\beta }\,_{16}^{32}S{{+}_{-1}}{{e}^{0}}+\overline{v}\]where v is the anti-neutrino. In \[{{\beta }^{+}}\] decay a positron is emitted as \[_{11}^{22}Na\xrightarrow[{}]{{}}\,_{10}^{22}Ne{{+}_{+1}}{{e}^{0}}+v\] where v is the neutrino.
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