Year 1- Particles

Question 1

relative mass of a proton

Answer 1

1

Question 2

relative mass of a neutron

Answer 2

1

Question 3

relative mass of an electron

Answer 3

0.0005

Question 4

mass of a proton

Answer 4

1.6 x 10^-27

Question 5

mass of a neutron

Answer 5

1.6 x 10^-27

Question 6

mass of an electron

Answer 6

9.11 x 10^-31

Question 7

charge of a proton

Answer 7

1.6 x 10^-19

Question 8

charge of a neutron

Answer 8

0

Question 9

charge of an electron

Answer 9

-1.6 x 10^-19

Question 10

another term for the proton number

Answer 10

atomic number

Question 11

in a neutral atom, what is the amount of electrons equal to ?

Answer 11

protons

Question 12

What is a nucleon ?

Answer 12

A proton or a neutron

Question 13

What is the strong nuclear force ?

Answer 13

Responsible for keeping nucleons together in a nucleus

Question 14

What are other forces acting on the nucleus ?

Answer 14

Electrostatic- charge of nucleons
gravitational- mass of the particles

Question 15

What is the benefit of the strong nuclear force ?

Answer 15

The electrostatic repulsion is greater than the gravitational attraction, without the strong nuclear force, the protons would fly apart in all directions

Question 16

Between what distance is the strong nuclear force attractive ?

Answer 16

0.5fm to 3fm

Question 17

What must the strong nuclear force and how would the nucleus be affected without it ?

Answer 17

A small amount of repulsion. Without it, the nucleus would be crushed to a point

Question 18

An excess amount of _____ means that alpha decay occurs

Answer 18

Protons

Question 19

An excess amount of _____ means that beta decay occurs

Answer 19

Neutrons

Question 20

Where does alpha emissions tend to occur and why ?

Answer 20

In big nuclei, because the nucleus of these atoms tend to be too big for the strong nuclear force to keep them together

Question 21

What is emitted in beta decay ?

Answer 21

Electron (beta particle)
Anti neutrino (initially recognised as kinetic energy due to the conservation of energy.

Question 22

What can light be emitted as ?

Answer 22

Wave
Photon (particle)

Question 23

Define electron volt

Answer 23

Magnitude of energy needed to accelerate an electron across a potential difference of 1V

Question 24

What is 1eV equivilant to

Answer 24

1.6 × 10-19 J