Standard Model
Energy levels
Mass- Energy
Photons
Potpourri
100
According to the standard model of physics a baryon is composed of
3 quarks
100
An electron in an excited mercury atom is in energy level g. What is the minimum energy required to ionize this atom?
2.48 eV
100
What is the total energy released when 9.11 × 10−31 kilogram of mass is converted into energy?
8.20 × 10−14 J
100
What color light in the visible spectrum has the least energy per photon
red
100
An antimuon neutrino is a
lepton with a −le charge
lepton with 0 charge
meson with a −le charge
meson with 0 charge
B. lepton with 0 charge
200
What is a meson composed of?
quark and antiquark
200
What is the energy of the photon emitted when an electron in a mercury atom drops from energy level f to energy level b?
3.06 eV
200
A deuteron is formed by combining a proton and a neutron. The mass of a deuteron is 2.39 × 10−3 universal mass unit less than the combined masses of a proton and a neutron. This mass difference is equivalent to ......... MeV
2.23 MeV
200
Which graph best represents the relationship between photon energy and photon wavelength?
200
A charm quark has a charge of approximately
- 5.33 × 10−20 C
- 1.07 × 10−19 C
- 1.60 × 10−19 C
- 2.40 × 10−19 C
B) 1.07 × 10−19 C
300
Protons and neutrons are composed of smaller particles called?
quarks
300
What is the minimum energy required to ionize a hydrogen atom in the n = 3 state?
1.51 eV
300
The energy equivalent of the rest mass of an electron is
- 2.73 × 10−22 J
- 8.20 × 10−14 J
- 1.50 × 10−10 J
- 1.44 × 10−2 J
B.) 8.20 × 10−14 J
300
The frequency of a photon whose energy is 2X10-19 J Don't forget the correct units....
3 x 1014 Hz
300
What is the mass and charge of the anti-particle of an electron?
mass 9.11 x 10-31 kg, charge is +1
400
What type of matter is not affected by the strong force?
Leptons
400
A mercury atom in the ground state absorbs 18 eV of energy and is ionized by losing an electron. How much kinetic energy does this electron have after the ionization?
7.62eV
400
A nuclear reactor produces 2.7 × 1016 joules of energy per year. How much mass is converted to energy by the reactor in one year?
0.30 kg
400
A photon having an energy of 4.2 eV strikes mercury in the ground state. Is it absorbed? Why or why not?
It is not absorbed because it does not have the minimum amount of energy.
400
What happens when a particle and it's anti-particle collide?
They annihilate each other and the mass is converted to energy.
500
The lambda baryon has the quark composition uds. Which particle has the same electric charge as the lambda baryon?
- neutron
- electron
- proton
- antimuon
A.) neutron
500
An electron in the c level of a mercury atom returns to the ground state. Which photon energy could not be emitted by the atom during this process?
- 0.22 eV
- 4.64 eV
- 4.86 eV
- 5.43 eV
D.) 5.43 eV
500
How many kilograms of matter would have to be converted into energy to produce 24.0 megajoules of energy?
2.67 x 10-10kg
500
A photon having a wavelength of 2.29 x 10-7 m strikes a mercury atom in the ground state. Calculate the energy in Joules.
8.69 x 10-19 J
500
What is conserved in a photon-particle collision (give at least two)
mass, energy, momentum