Atoms and radiation

Question 0

If the relative mass of a proton is one,what is the relative mass of a neutron?

Answer 0

1 as they are always the same

Question 1

If the charge of an electron is -1,what are the charges of the proton and neutron?

Answer 1

Proton +1 and neutrons 0

Question 2

What do you call Atoms with the same atomic mass but different mass numbers?

Answer 2

Isotopes

Question 3

Where is most of the mass of an atom found?

Answer 3

The nucleus

Question 4

In the plum pudding model of an atom,what were the plums?

Answer 4

Electrons

Question 5

What type of radiation was used in Rutherford’s scattering experiment?

Answer 5

Alpha

Question 6

The mass number of an atom is?

Answer 6

The number of protons and neutrons it contains

Question 7

An atom of uranium has 92 protons and 146 neutrons. It must also have….

Answer 7

92 electrons as the number of protons and neutrons are the same

Question 8

An atom which gains electrons becomes?

Answer 8

Negatively charged

Question 9

Compare to a whole atom,nucleus is in size?

Answer 9

Much smaller

Question 10

Name to natural sources of radiation:

Answer 10

1. Food and drink

2. Medical x-rays

Question 11

What contributes most of our average dose of background radiation?

Answer 11

Natural sources

Question 12

A teacher used to Geiger counter to measure the radiation of a radioactive rock. Wrapping the rock In paper and Aluminium had no effect on the Count rate. Explain why?

Answer 12

The rock emits gamma radiation

Question 13

What happens to photographic film when it is exposed to radiation and then developed?

Answer 13

When exposed it goes darker

Question 14

What do radiation badges do?

Answer 14

Radiation badges monitor the radiation dose worker receives

Question 15

The half life of an isotope is one hour. How long will it take for the count rate to fall to one quarter from the starting rate?

Answer 15

two hours

Question 16

What happens to the half life of a substance when it is put into a freezer?

Answer 16

The half life of an isotope cannot be changed by changing temperature so it stays the same

Question 17

Which combination of features will be best when choosing a radioactive source for use as a medical tracer?

Answer 17

Gamma emitter with a short half life

Question 18

Which type of radiation is going to be best for monitoring the thickness of aluminium cooking foil in a factory?

Answer 18

Beta

Question 19

What sort of reaction is happened when a hydrogen-3 atom becomes a helium -3 atom?

Answer 19

Nuclear reaction

Question 20

Name 2 things that happen when a nucleus splits:

Answer 20

1. Nuclear fusion

2. Radiation is released

Question 21

The chain reaction in nuclear reactors need the absorption of:

Answer 21

Neutrons

Question 22

What particles are given out when the uranium atom undergoes fission?

Answer 22

Neutrons

Question 23

In the use of nuclear reactions for generating electricity:

Answer 23

Fusion is still experimental