Alpha rays emitted from a radioactive substance are

Mention two properties of each of the radioactive rays emitted from a radioactive substance.

beta rays emitted by a radioactive material are

The number of beta particles emitted by a radioactive substance is twice the number of alpha particles emitted by it. There resulting daughter is an:

The number of beta particles emitted by a radioactive substance is twice the number of alpha particles emittedby it. The resulting daughter in an:

Which is not emitted by radioactive substance ?