Types of Radioactive Decay

Which type of radiation has zero charge?

(a)  

State the relative mass of a gamma ray.

(a)  

Which type of radiation is the most ionising?

(a)  

What is the structure of gamma radiation?

• a Helium nucleus

• a fast-moving positron

• an electromagnetic wave

• a neutron

Alpha particles are strongly ionising because they have a large relative mass.

• True

• False

An alpha particle has a relative charge of (a)   .

An alpha particle has a relative mass of (a)   .

Radioactive isotopes undergo nuclear decay for this reason. 

• to make new elements

• to produce energy

• to combine chemically

• to become stable

The three main types of nuclear radiation are alpha, beta, and gamma. Which of the following lists these types of radiation from highest penetrating power to lowest penetrating power?

• alpha, gamma, beta

• beta, alpha, gamma

• beta, gamma, alpha

• gamma, beta, alpha

The charge of an atom is:

(a)