Quantum Mechanics

Atomic line emission spectra are evidence that electrons exist in discrete energy levels. Discrete energy levels are part of which atomic theories?

• Dalton

• Plum Pudding

• Bohr model

• Quantum mechanical

What was wrong with the Bohr model?

• It was disproved by the gold foil experiment.

• It could only describe the emission spectrum of hydrogen.

• It could only describe the emission spectra of elements with more than one electron.

• It was disproved by the cathode ray experiment.

After the Solvay Conference of 1927, scientists performed the Double Slit experiment with electrons. The results showed ___.

• electrons behave like particles

• electrons behave like waves

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Heisenberg's Uncertainty Principle states that it is impossible to know both the ___________ and the __________ of a particle at the same time.

• velocity, position

• velocity, energy

• position, energy

• velocity, speed

Light is emitted when an electron moves from the ________ state to the _________ state.

• excited, ground

• ground, excited

Tags

NGSS.HS-PS1-2

NGSS.HS-PS4-3

If an electron moves from n=2 to n=4 ...

• it absorbs energy
• it releases energy

A region in space where there is a high probability of finding an electron in an atom or molecule is known as

• shell

• orbital

• orbit

• excited state

What are the shapes of p orbitals ?

• cloverleaf

• spherical

• dumbbell

How many orbitals are there in the p sublevel?

• 1

• 3

• 5

• 7

What is the maximum number of electron that be be held in the 4p sublevel?

• 3

• 4

• 6

• 8