7. Atomic, nuclear and particle physics

Question 1

Lyman series

Answer 1

UV, transition to n=1

Question 2

Balmer series

Answer 2

Visible, transition to n=2

Question 3

Paschen series

Answer 3

IR, transition to n=3

Question 4

Isotope

Answer 4

A version of an atom with a different number of neutrons

Question 5

Absorption of alpha particle

Answer 5

Skin, paper, 5cm air

Question 6

Absorption of beta

Answer 6

A few cms body tissue, a few mms metal , 25fm air

Question 7

Absorption of gamma

Answer 7

A few cms lead, several ms concrete

Question 8

Half life

Answer 8

The time taken for half of the initial number of nuclei to decay OR for the activity to fall by half

Question 9

The unified atomic mass unit

Answer 9

1/12th the rest mass of an unbound C12 atom in its nuclear and electronic ground state.

Question 10

Nuclear binding energy

Answer 10

The energy required to completely separate the nucleons in an atom.

Question 11

Mass defect

Answer 11

The difference in mass of the products and reactants of a nuclear reaction.

Question 12

Hadron

Answer 12

A particle formed from quarks.

Question 13

Baryon

Answer 13

A particle formed from 3 quarks.

Question 14

Meson

Answer 14

A particle formed from 2 quarks.

Question 15

Lepton

Answer 15

Particle from electron and neutrino family.

Question 16

Boson

Answer 16

Force carrying particle.