Question

A thorium-232 nucleus decays by a series of alpha and beta emissions until it reaches astatine-212. how many alpha emissions and how many beta emissions occur in this series of decays?

Answer 1

There are 5 alpha and 5 beta particle  emit emission of thorium-232 nucleus into astatine-212.

A beta ray would be released from such an atomic nucleus during a radioactive decay process known as beta decay. The proton in the nucleus changes from a proton to a neutron throughout beta decay, and vice versa.

It is given that, The atomic mass of Th = 232

Atomic mass of astatine = 212

Atomic number of Th = 90.

Atomic number of  astatine = 85

Number of alpha particle = difference between atomic mass / 4

Number of alpha particle = 232-212 /4

Number of alpha particle = 20/4

Number of alpha particle = 5

Thus, the number of alpha particle will be 5.

Number of beta particle = difference between atomic number

Number of beta particle = 90-85

Number of beta particle = 5

Thus, the number of beta particle will be 5

Therefore, the number of alpha and beta particle will be 5 and 5.

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