Particles and Radiation

Question 1

Every atom contains?

Answer 1

Positively charged nucleus of protons and neutrons. Electrons that surround nucleus.

Question 2

What is the Planck constant

Answer 2

6.63×10^-34Js

Question 3

What is the work function of a material.

Answer 3

The minimum energy required for an electron to bcome delocalised

Question 4

What is an Isotope?

Answer 4

An atom of an element with different number of neutrons.

Question 5

Define specific charge.

Answer 5

Its charge divided by its mass.

Question 6

Which force stops the nuclei of a stable isotope from disintegrating?

Answer 6

Strong nuclear force.

Question 7

How does strong nuclear force keep the protons and neutrons together?

Answer 7

It overcomes the electrostatic force of repulsion between the protons in the nucleus.

Question 8

What is roughly the range for the Strong nuclear force?

Answer 8

3-4 femtometres (fm)

Question 9

What are the three types of radiation naturally released by Radioactive isotopes?

Answer 9

Alpha. Beta. Gamma.

Question 10

If a nucleus of mass X emits an alpha particle, what is the new mass number?

Answer 10

X-4

Question 11

What is the mass and the charge of Gamma emitted by an unstable nucleus?

Answer 11

0

Question 12

How many protons and neutrons do alpha particles consist of?

Answer 12

2 Protons. 2 Neutrons.

Question 13

What does Beta radiation consist of?

Answer 13

Fast moving electrons.

Question 14

What is the rest mass of a MUON compared to an electron?

Answer 14

200 times the size on on electron

Question 15

What is the charge of a MUON?

Answer 15

Negatively Charged

Question 16

What is the charge of π+?

Answer 16

Positively Charged

Question 17

What is the charge of π-?

Answer 17

Negativey Charged

Question 18

What is the charge of π0?

Answer 18

Neutral Charge

Question 19

Does π have a greater rest mass than a muon?

Answer 19

Yes , but it has a smaller rest mass than a proton

Question 20

Does π have a greater rest mass than a muon?

Answer 20

Yes , but it has a smaller rest mass than a proton

Question 21

What is the charge of K+?

Answer 21

Positively Charged

Question 22

What is the charge of K-?

Answer 22

Negatively Charged

Question 23

What is the charge of K0?

Answer 23

Neutral Charge

Question 24

What is the ground state of an atom

Answer 24

The lowest energy state of an electron

Question 25

What is the charge of a Beta particle in relativity to a proton?

Answer 25

Equal and opposite

Question 26

What speed do electromagnetic waves travel in a vacuum

Answer 26

3 x 10^8ms^-1 Speed of light

Question 27

Electromagnetic waves are emitted as short bursts of waves. Each burst is also referred as?

Answer 27

a Photon

Question 28

Who was the photon theory established by?

Answer 28

Einstein

Question 29

Equation for the energy of a Photon?

Answer 29

E = hf

Question 30

What does ‘h’ represent in E = hf

Answer 30

Planck’s constant

Question 31

What happens when antimatter and matter particles meet each other?

Answer 31

Annihilation, they destroy each other and radiation is released

Question 32

Anti-particle of the electron

Answer 32

positron

Question 33

Does muon have a greater rest mass than K?

Answer 33

No , K has a greater rest mass than muon but less than a proton

Question 34

What is the symbol of Muon?

Answer 34

μ

Question 35

What is the symbol for Pion?

Answer 35

π

Question 36

What is the symbol for Kaon?

Answer 36

K

Question 37

What does kaon decay into?

Answer 37

Pions

Or

Muon and a antineutrino

Or

antimuon and a neutrino

Question 38

What does π0 decay into?

Answer 38

high energy protons

Question 39

What rules does decay always follow?

Answer 39

Conservation rules for energy, momentum and charge.

Question 40

Whatvdoes a muon decay into?

Answer 40

An electron and an antineutrino