Modern Physics Quiz Part III

What do alpha-particle scattering experiments indicate about an atom's structure?
1. Positive and negative charges are evenly distributed.
2. Positive charge is concentrated in a small, dense core.
3. Negative charge fills the space around the core.
4. Electrons occupy distinct energy levels.
According to the Rutherford model of the atom, an atomic nucleus contains
1. all of the atom's electric charge, but none of the atom's mass
2. most of the atom's mass and all of the atom's negative charge
3. most of the atom's mass and all of the atoms positive charge
4. 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
1. 120 degrees
2. 0 degrees
3. 90 degrees
4. 180 degrees
The term "electron cloud" refers to the
1. cathode rays in a gas discharge tube
2. high-probability region for an electron in an atom
3. negatively charged cloud that can produce a lightning strike
4. electron plasma surrounding a hot wire
Which statement most accurately describes the interaction which binds a nucleus together?
1. short-range and weak
2. long-range and strong
3. long-range and weak
4. short-range and strong
What is the force which holds the nucleons of an atom together?
1. magnetic force
2. nuclear force
3. coulomb force
4. atomic force
Which particle would generate the greatest amount of energy if its entire mass were converted into energy?
1. electron
2. neutron
3. proton
4. alpha particle
Approximately how much energy is produced when 0.50 atomic mass unit is completely converted into energy?
1. 9.3 x 10 ^ 2 MeV
2. 4.7 MeV
3. 9.3 Mev
4. 4.7 x 10 ^ 2 MeV