Atomic Structure Quiz

State one conclusion from Rutherford's experiment that contradicts one conclusion made by Thomson.

• Atoms are indivisible.

• Atoms have a dense nucleus.

• Electrons are embedded in a positive sphere.

• Atoms are electrically neutral.

State one aspect of the modern model of the atom that agrees with a conclusion made by Thomson.

• Atoms are mostly empty space.

• Electrons orbit the nucleus.

• Atoms have a positive center.

• Electrons are embedded in a positive sphere.

What was Bohr's most important contribution to atomic structure?

• Discovery of the neutron.

• Proposal of the electron cloud model.

• Introduction of electron orbits.

• Discovery of the proton.

Draw a Bohr Model for a gold atom.

• Gold-197

• Gold-198

• Gold-199

• Gold-200

State, in terms of the number of subatomic particles, one similarity and one difference between the atoms of these isotopes of sulfur.

• Similarity: Same number of protons; Difference: Different number of neutrons

• Similarity: Same number of electrons; Difference: Different number of protons

• Similarity: Same atomic mass; Difference: Different natural abundance

• Similarity: Same number of neutrons; Difference: Different number of electrons

Calculate the value of the atomic mass of sulfur. Be sure to include a unit.

• 32.07 amu

• 33.07 amu

• 34.07 amu

• 35.07 amu

Which line of the Balmer Series has the highest frequency?

• Violet

• Red

• Blue green

• Blue

Which line of the Balmer Series has the highest energy?

• Violet

• Red

• Blue green

• Blue

Naturally occurring boron consists of two isotopes, boron-10 and boron-11. If the atomic mass of natural boron is 10.8, what is the percentage that is boron-10?

• 0%

• 20%

• 50%

• 80%

• 100%

Which supports the conclusion that the energy of electrons in atoms are quantized?

• Mass spectrometer beam distribution

• Emission spectra of gaseous elements

• Cathode ray deflection by a magnetic field

• Scattering of alpha particles by metal foil

• Radioactive transmutation of elements