A positron is emitted by radioactive nucleus of proton no `90`. The product nucleus will have proton number

A position is emitted by a radio active nucleus of at omic number 90.The product nucleus will have atomic number ...

A positron is emitted by a radioactive nucleus of atomic number 90. What is the atomic number of the product nucleus ?

Some radioactive nucleus may emit

Some radioactive nucleus may emit.

Some radioactive nucleus may emit.

The same radioactive nucleus may emit

An element X decays first by positron emission and then two alpha - particles are emitted in successive radioactive decay. If the product nucleus has a mass number 229 and atomic number 89, the mass number and the atomic number of element X are

When a proton in a radioactive nucleus becomes a neutron, the emitted particle is

Six protons are found in the nucleus of