What is the most current model of the atom?

• Bohr Model

• Rutherford Model

• Thomson Model

• Quantum Mechanical Model

What is the smallest unit of an element that retains its chemical properties?

• Molecule

• Atom

• Particle

• Cell

Who proposed that electrons occupy specific energy levels or orbit around the nucleus?

• Rutherford

• Chadwick

• Thomson

• Bohr

Which subatomic particle is found outside the nucleus of the atom?

• Proton

• Photon

• Electron

• Neutron

What experiment led to the discovery of the nucleus of the atom?

• Cathode Ray Experiment

• Neutron Diffraction Experiment

• Gold Foil Experiment

• Electron Cloud Experiment

Which subatomic particle has no electric charge?

• Photon

• Neutron

• Electron

• Proton

What is the average width of a human hair in nanometers?

• 10,000 - 50,000 nm

• 80,000 - 100,000 nm

• 1 - 10 nm

• 500 - 1,000 nm

What is the mass relationship of electrons compared to protons and neutrons?

• Varies depending on the atom

• Less than protons and neutrons

• Equal to protons and neutrons

• Greater than protons and neutrons

What did Chadwick hypothesize about the radiation observed in the Gold Foil Experiment?

• It consisted of photons

• It consisted of neutral particles

• It consisted of negatively charged particles

• It consisted of positively charged particles

What do electrons create around the nucleus of the atom due to their rapid movement?

• Photon Cloud

• Electron Cloud

• Proton Cloud

• Neutron Cloud