Quiz on Atomic Models

The modern model of an atom shows that electrons are

• Orbiting the nucleus in fixed paths

• Found in regions called orbitals

• Combined with neutrons in the nucleus

• Located in a solid sphere covering the nucleus

In the wave-mechanical model, the orbital is a region in space of an atom where there is a

• High probability of finding an electron

• High probability of finding a neutron

• Circular path in which electrons are found

• Circular path in which neutrons are found

The modern model of the atom is based on the work of

• One scientist over a short period of time

• One scientist over a long period of time

• Many scientists over a short period of time

• Many scientists over a long period of time

Which group of atomic models is listed in order from the earliest to the most recent?

• Hard-sphere model, wave-mechanical model, electron-shell model

• Hard-sphere model, electron-shell model, wave-mechanical model

• Electron-shell model, wave-mechanical model, Hard-sphere model

• Electron-shell model, Hard-sphere model, wave-mechanical model

An experiment in which alpha particles were used to bombard thin sheets of gold foil led to the conclusion that an atom is composed mostly of

• A large, dense, positively charged nucleus

• A large, dense, negatively charged nucleus

• Empty space and has a small, positively charged nucleus

• Empty space and has a small, negatively charged nucleus

State one conclusion about the internal structure of the atom that resulted from the gold foil experiment.

• Atoms are mostly empty space.

• Electrons are located in the nucleus.

• Protons are evenly distributed throughout the atom.

• The nucleus is negatively charged.

State one way in which the Bohr model agrees with the Thomson Model.

• Both models describe the atom as a solid sphere.

• Both models include electrons.

• Both models describe the atom as a nucleus surrounded by electrons.

• Both models are based on quantum mechanics.

Using the conclusion from the Rutherford model, identify the charged subatomic particle that is located in the nucleus.

• Proton

• Electron

• Neutron

• Photon

State the model that first included electrons as subatomic particles.

• Plum Pudding Model

• Bohr Model

• Rutherford Model

• Dalton's Atomic Theory

What does the atomic number of an element represent?

• The number of protons in the nucleus

• The number of neutrons in the nucleus

• The total number of protons and neutrons in the nucleus

• The total number of protons and electrons in an atom