SK015 WEEK 4

Define "quantized"

• The electron's mass is very small. 
• The electron is actually a wave.
• The position & momentum of the electron cannot be known at the same time. 
• The electron is limited to certain positions in the atom.

"Electrons have particle and wave-like properties."

• Planck
• Heisenberg
• de Broglie
• Schrodinger

Why are we not allowed to know the position and momentum of the electron? 

• the size of the nucleus
• the electron's mass is too small
• the electron behaves like a wave
• it moves too fast

The position & momentum of the electron cannot be known at the same time. 

• Planck
• Heisenberg
• de Broglie
• Schrodinger

How many electrons can an energy level of n = 2 hold?

• 32
• 24
• 8
• 6

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

The Heisenberg Uncertainty Principle states

• velocity and position cannot be determined at the same time
• a beam of light can interfere with the path and speed of an electron
• photons do not affect the position of an electron
• the velocity of a car cannot accurately be measured by a radar beam

All of the following statements about classical mechanics are true except one.

• all objects move with wave-like motion
• objects gain or lose energy in any amount
• the materials demonstrate wave-particle duality
• size and mass of objects obscures any quantum effects

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

What are the shapes of p orbitals ?

• cloverleaf

• spherical

• dumbbell