Quantum Mechanical Model

Which of the following scientists was not involved in the development of quantum theory?

• Schrodinger

• Planck

• Bohr

• Heisenberg

One of the key understandings of quantum theory is that atoms emit energy in

• random amounts.

• specific amounts.

• only the gamma range of the electromagnetic spectrum.

• only the microwave range of the electromagnetic spectrum.

Tags

NGSS.HS-PS4-3

Bohr's model of the atom is sometimes called the planetary model. If the atoms is like a solar system, what is analogous to the sun?

• energy levels

• electrons

• neutrons

• the nucleus

According to DeBroglie, electrons can act like

• particles only.

• waves only.

• both waves and particles.

• spoiled brats.

Tags

NGSS.HS-PS4-3

According to Heisenberg, what two things are impossible to know at the same time regarding an electron? Check both of the correct answers.

• exact charge

• velocity

• mass

• precise location

Because of Heisenberg's ideas about the atom, scientists modified the Bohr model of the atom. The new idea involved orbitals which are

• two dimensional pathways.

• actual "strings" on which the electrons travel like beads on a necklace.

• three-dimensional regions of probability where electrons are most likely to be found.

• a cell-like structure that contains the electrons.

• shape.

• main energy level.

• velocity.

• charge.

• the shape of the orbital.

• the distance from the nucleus.

• the number of electrons in the d sublevel at the fifth level.

• the number of electrons contained in a single d orbital.

An s orbital is shaped like a _____________, and a p orbital is shaped like a ________________.

• flower; leaf

• square; pyramid

• cylinder; cone

• sphere; dumbbell

According to the Aufbau principle, how do electrons fill the energy levels?

• from highest to lowest energy.

• from lowest to highest energy.

• from f to s levels.

• randomly.