7.1 atoms and radiation

Question 1

What does a radioactive substance contain?

Answer 1

Unstable nuclear that becomes stable by emitting radiation

Question 2

How many types of radiation are there?

Answer 2

There are three main types of radiation from radioactive substances (a, b, and y)

Question 3

When does radioactive decay happen?

Answer 3

Radioactive decay is a random event – you can’t predict when it will happen

Question 4

What do radiation radioactive sources emit?

Answer 4

A, B, and Y radiation

Question 5

What does A represent?

Answer 5

Alpha radiation

Question 6

What does B represent?

Answer 6

Beta radiation

Question 7

What does Y represent?

Answer 7

Gamma radiation

Question 8

What is Alpha radiation?

Answer 8

Alpha particles, (each composed of two protons and two neutrons) or omitted by unstable nuclear

Question 9

What is beta radiation?

Answer 9

Beta particles that are high energy electrons created in, and emitted from, unstable nuclei

Question 10

What is gamma radiation?

Answer 10

Electromagnetic radiation emitted from unstable nuclei in radioactive substances