Year 1- Particles

Question 1

relative mass of a neutron

Answer 1

1

Question 2

relative mass of an electron

Answer 2

0.0005

Question 3

mass of a proton

Answer 3

1.6 x 10^-27

Question 4

mass of a neutron

Answer 4

1.6 x 10^-27

Question 5

mass of an electron

Answer 5

9.11 x 10^-31

Question 6

charge of a proton

Answer 6

1.6 x 10^-19

Question 7

charge of a neutron

Answer 7

0

Question 8

charge of an electron

Answer 8

-1.6 x 10^-19

Question 9

another term for the proton number

Answer 9

atomic number

Question 10

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

Answer 10

protons

Question 11

What is a nucleon ?

Answer 11

A proton or a neutron

Question 12

What is the strong nuclear force ?

Answer 12

Responsible for keeping nucleons together in a nucleus

Question 13

What are other forces acting on the nucleus ?

Answer 13

Electrostatic- charge of nucleons
gravitational- mass of the particles

Question 14

What is the benefit of the strong nuclear force ?

Answer 14

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

Question 15

Between what distance is the strong nuclear force attractive ?

Answer 15

0.5fm to 3fm

Question 16

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

Answer 16

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

Question 17

An excess amount of _____ means that alpha decay occurs

Answer 17

Protons

Question 18

An excess amount of _____ means that beta decay occurs

Answer 18

Neutrons

Question 19

Where does alpha emissions tend to occur and why ?

Answer 19

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

Question 20

What is emitted in beta decay ?

Answer 20

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

Question 21

What can light be emitted as ?

Answer 21

Wave
Photon (particle)

Question 22

Define electron volt

Answer 22

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

Question 23

What is 1eV equivilant to

Answer 23

1.6 × 10-19 J