Question
What is $\beta^– –$ decay? Also explain the changes that occur in the parent nuclei due to $\beta-$emission with one example.
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Answer
$\beta^– –$ decay: The emission of negatively charged stream of $\beta^–$ particles from the nucleus is called $\beta^– –$ decay.
$i. \beta^– –$ Particles are electrons with a charge and mass of an electron, mass being negligible as compared to the nuclei.
$ii.$ When a nucleus decays by emitting a high$-$speed electron called a beta particle $(\beta),$ a new nucleus is formed with the same mass number as the original nucleus and with an atomic number that is one unit greater than the parent nuclei.
General equation:
$i. \beta^– –$ Particles are electrons with a charge and mass of an electron, mass being negligible as compared to the nuclei.
$ii.$ When a nucleus decays by emitting a high$-$speed electron called a beta particle $(\beta),$ a new nucleus is formed with the same mass number as the original nucleus and with an atomic number that is one unit greater than the parent nuclei.
General equation:
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