Quiz on Atomic Structure

Which conclusion directly resulted from the “gold foil experiment?”

• Atoms are mostly empty space.

• Atoms are hard, indivisible spheres.

• Electrons are located in shells.

• Electrons have a small mass.

In the wave-mechanical model of an atom, an orbital is defined as

• a region of the most probable neutron location

• a region of the most probable electron location

• the straight-line path of a neutron

• the straight-line path of an electron

According to the wave-mechanical model, in the ground state, the 10 electrons of a neon atom would be located

• in the nucleus

• in orbitals

• in the first shell

• in the valence shell

An experiment using alpha particles to bombard a thin sheet of gold foil indicated that most of the volume of the atoms in the foil is taken up by

• electrons

• protons

• neutrons

• empty space

The atoms in a sample of an element are in excited states. A bright-line spectrum is produced when these atoms

• absorb energy

• absorb positrons

• emit energy

• emit positrons

Which conclusion was proposed as a result of an experiment during which some alpha particles were deflected while passing through a thin sheet of gold foil?

• Atoms are hard, indivisible spheres.

• Atoms have small, dense, positive nuclei.

• Atoms contain negatively charged particles.

• Atoms have electrons with wavelike properties.

Which proposal in the development of the modern model of the atom was made before the others?

• Atoms are hard, indivisible spheres of different sizes.

• Atoms are mostly empty space with a small dense nucleus.

• Atoms have electrons that have wavelike properties.

• Atoms have an internal structure that contains negative particles.

What is the correct Lewis electron-dot diagram for CF₄?

• Option 1

• Option 2

• Option 3

• Option 4

An orbital is a region of space where there is a high probability of finding

• a proton

• a positron

• a neutron

• an electron

Which atom in the ground state has an outermost electron with the most energy?

• Cs

• K

• Li

• Na