SK015- 2.2 Quantum Mechanical Model

An electron cloud

• represents a 50% probability of finding an electron
• has uniform density
• can be called an orbital
• can only show where the electron is not located

p orbitals are __________ shaped

• ball
• dumb bells
• cloud
• funky

The n quantum number gives information about

• Size and Energy of the energy level
• orientation of the orbital
• spin of the electron
• shape of the orbital

The quantum number "n" represents:

• electron spin
• orbital
• sublevel
• energy level

What orbital is shown in the picture?

• s orbital

• p orbital

• d orbital

• f orbital

What is the difference in a 1s orbital and a 2s orbital?

• The shape of the orbital

• The size of the orbital

• The number of electrons it can hold

• None of the above

The quantum numbers describe all the characteristics of an electron except

• orbital shape
• velocity 
• energy level
• magnetic spin

Which quantum number represents the shape of the orbital?

• principal quantum number

• azimuthal (angular momentum) quantum number

• magnetic quantum number

• spin quantum number

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.

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