P7

Question 1

Nuclear Radiation is

Answer 1

When the nucleus of an atom emits radiation because it is unstable. It would be unstable because there would be too many protons, nuetrons or its too large

Question 2

A radioactive substance is and why?

Answer 2

When the nucleus of an atom wmits radiation because it is unstable.

• this would be because it has either too many protons, too many neurons or its to big

Question 3

Alpha particles are made of and whats ita charge and its mass

Answer 3

• 2 protons and 2 neutrons.
• charge of 2+
• mass of 4.
  Alpha particle: 4
  2

Question 4

When an atom emits alpha decay the nucleus loses

Answer 4

2 protons and 2 neutrons

Question 5

What is a beta particle?

Answer 5

Beta particles is an electron created and emitted by a nucleus which has too many neutrons compared to protons.
- mass = 0
- charge = -1
- a nuetron turns into a proton, emitting a beta particle at high speeds instantly from the nucleus.
- beta particle 0
-1

Question 6

What would be produced when a potassium-40 decays emitting a beta particle?

Answer 6

Potassium40. ——–> Ca40/20 + B 0/-1
19.

Because nuetrons change to protons the -1 becomes +1 so you make the 19, 20 and its Ca

Question 7

What would be produced when a thorium-228 decays emitting an alpha particle

Answer 7

Th 228. &raquo_space;»» 224 Ra. + 4 a
90. 88. 2

Question 8

Ionising power and penetrative power: of alpha, beta and gamma

Answer 8

Beta : medium
Alpha: very good
Gamma: relatively poor

Beta: medium
Alpha: least
Gamma: most

Question 9

Alpha is

Answer 9

Helium nucleus

Question 10

Beta is

Answer 10

Very fast electron

Question 11

Gamma is

Answer 11

Electromagnetic radiation

Question 12

Gamma ray charge

Answer 12

0

Question 13

Alpha nature and beta nature and gamma nature

Answer 13

Particle = a and b
Wave= gamma

Question 14

Gamma symbol

Answer 14

y