Modern Physics Quiz Part III
What do alpha-particle scattering experiments indicate about an atom's structure?
- Positive and negative charges are evenly distributed.
- Positive charge is concentrated in a small, dense core.
- Negative charge fills the space around the core.
- Electrons occupy distinct energy levels.
According to the Rutherford model of the atom, an atomic nucleus contains
- all of the atom's electric charge, but none of the atom's mass
- most of the atom's mass and all of the atom's negative charge
- most of the atom's mass and all of the atoms positive charge
- all of the atom's mass, but none of the atom's electric charge
According to the Rutherford scattering experiments, the alpha particles in head-on collisions were scattered at angles of
- 120 degrees
- 0 degrees
- 90 degrees
- 180 degrees
The term "electron cloud" refers to the
- cathode rays in a gas discharge tube
- high-probability region for an electron in an atom
- negatively charged cloud that can produce a lightning strike
- electron plasma surrounding a hot wire
Which statement most accurately describes the interaction which binds a nucleus together?
- short-range and weak
- long-range and strong
- long-range and weak
- short-range and strong
What is the force which holds the nucleons of an atom together?
- magnetic force
- nuclear force
- coulomb force
- atomic force
Which particle would generate the greatest amount of energy if its entire mass were converted into energy?
- electron
- neutron
- proton
- alpha particle
Approximately how much energy is produced when 0.50 atomic mass unit is completely converted into energy?
- 9.3 x 10 ^ 2 MeV
- 4.7 MeV
- 9.3 Mev
- 4.7 x 10 ^ 2 MeV