Changes Within the Nucleus in Alpha, Beta and Gamma Emission

A nucleus is \[\ce {^24_11 Na}\] is β-radioactive.

What are the numbers 24 and 11 called? 

Complete the following nuclear changes:

\[\ce {X \text ->[β] X_1 \text ->[α] X_2 \text ->[α] ^172_69 X_3}\]

What changes occurs in the nucleus of radioactive elements when it emits (a) an alpha particle (b) beta particle and (c) gamma radiations? Give one example in each case in support of your answer.

An element P disintegrates by α-emission and the new element suffers two further disintegration, both by β-emission, to form an element Q. Explain that fact P and Q are isotopes.

A nucleus of stable phosphorus has 15 protons and 16 neutrons.

1. What is its atomic number and mass number?
2. The nucleus of radio phosphorous has one neutron more than the stable nucleus. What will be its atomic number and mass number?
3. What will be the atomic number and mass number of new nucleus formed by decay of a β-particle by the radio phosphorus in part (b)?

Name the radiations that are emitted during the decay of a nucleus, which has highest penetrating power?

Does the emission of gamma radiation result in a change in the mass number?

Complete the following nuclear change:

\[\ce {^A_Z X \text ->[α] X_1 \text ->[γ] X_2 \text ->[2β] X_3}\]