David Marks Staff asked 4 years ago

If a radioactive nucleus alpha decays

If a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours, what is the identity of the original nucleus?\

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I also need the nuclear equation. This for high school level chemistry. Thanks.

A radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. What is the identity of the original nucleus? Please show me nuclear equation also.(please this is for high school level questioned)

1 Answers
David Marks Staff answered 4 years ago

An alpha decay is a radioactive decay where a positively charged particle containing two protons and two neutrons decay from a radioactive nucleus. This corresponds to a Helium nucleus (A=4,Z=2; where A corresponds to Mass Number and Z to atomic number).
If such a decay yields an alpha particle and a Na-24 nucleus let us summarize the following:
Sodium has an Atomic number 11 and Mass 24 & Helium 2 and Mass 4 respectively. Therefore total Mass of original nucleus is 28 and Atomic number is 13.
Aluminium has an atomic number 13. Hence the original identity of the nucleus is Aluminium-28 isotope.