P7 - Radioactivity

Question 1

What is Alpha stopped by?

Answer 1

Paper.

Question 2

What can Beta go through?

Answer 2

Paper.

Question 3

Is Gamma more Penetrating than Beta?

Answer 3

Yes.

Question 4

What are the Three Main Types of Radiation?

Answer 4

Alpha, Beta and Gamma.

Question 5

Radioactive Sources Emit Alpha, Beta and _______ Rays.

Answer 5

Gamma.

Question 6

Radioactive Decay is a _________ Event.

Answer 6

Random.

Question 7

A Radioactive Substance contains ___________ Nuclei that become Stable by Emitting Radiation.

Answer 7

Unstable.

Question 8

Rutherford used Alpha Particles to Probe Inside _______.

Answer 8

Atoms.

Question 9

The ‘Plum Pudding’ Model could not explain why some Alpha Particles were ______________ through large Angles.

Answer 9

Scattered.

Question 10

An Atom has a Small Positively Charged Central _________ where most of the Atom’s Mass is Located.

Answer 10

Nucleus.

Question 11

The Nuclear Model of the Atom Correctly Explained why some ________ Particles Scattered through Large Angles.

Answer 11

Alpha.

Question 12

In Alpha and Beta Decay, the Number of ___________ in a Nucleus Changes.

Answer 12

Protons.

Question 13

The Atomic Number of a Nucleus is the Number of _________ in it.

Answer 13

Protons.

Question 14

The Mass Number of a __________ is the Number of Protons Plus Neutrons in it.

Answer 14

Nucleus.

Question 15

Isotopes are Atoms of the same __________ with Different Numbers of Neutrons.

Answer 15

Element.

Question 16

An Unstable Nucleus becomes more _________ by Emitting an Alpha, Beta or Gamma Particle.

Answer 16

Stable.

Question 17

What is the Top Number of Alpha?

Answer 17

4.

Question 18

What is the Bottom Number of Alpha?

Answer 18

2.

Question 19

What is the Top Number of Beta?

Answer 19

0.

Question 20

What is the Bottom Number of Beta?

Answer 20

-1.

Question 21

What is the Top and Bottom Number of Gamma?

Answer 21

0.

Question 22

What is Beta Stopped by?

Answer 22

A Thin Metal Sheet.

Question 23

What does Beta Radiation Consist of?

Answer 23

Fast-Moving Electrons.

Question 24

Beta is less ____________ than Alpha Radiation and more Ionising than Gamma Radiation.

Answer 24

Ionising.

Question 25

What is Gamma Radiation Stopped by?

Answer 25

Thick Lead.

Question 26

What does Gamma Radiation consist of?

Answer 26

Electromagnetic Radiation.

Question 27

Alpha, Beta and Gamma Radiation ________ Substances they pass through.

Answer 27

Ionise.

Question 28

The Half-Life of a Radioactive Isotope is the Average Time it takes for the Number of ________ of the Isotope in a Sample to have.

Answer 28

Nuclei.

Question 29

The Number of Atoms a Radioactive __________ and the Count Rate both ____________ by Half every Half-Life.

Answer 29

Isotope…Decrease…