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SK015- 2.2 Quantum Mechanical Model

Total questions: 10

Worksheet time: 20mins

Name
Class
Date
1.
An electron cloud
a)
represents a 50% probability of finding an electron
b)
has uniform density
c)
can be called an orbital
d)
can only show where the electron is not located
2.
p orbitals are __________ shaped
a)
ball
b)
dumb bells
c)
cloud
d)
funky
3.
The n quantum number gives information about
a)
Size and Energy of the energy level
b)
orientation of the orbital
c)
spin of the electron
d)
shape of the orbital
4.
The quantum number "n" represents:
a)
electron spin
b)
orbital
c)
sublevel
d)
energy level
5.

What orbital is shown in the picture?

a)

s orbital

b)

p orbital

c)

d orbital

d)

f orbital

6.

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

a)

The shape of the orbital

b)

The size of the orbital

c)

The number of electrons it can hold

d)

None of the above

7.
The quantum numbers describe all the characteristics of an electron except
a)
orbital shape
b)
velocity 
c)
energy level
d)
magnetic spin
8.

Which quantum number represents the shape of the orbital?

a)

principal quantum number

b)

azimuthal (angular momentum) quantum number

c)

magnetic quantum number

d)

spin quantum number

9.

What was wrong with the Bohr model?

a)

It was disproved by the gold foil experiment.

b)

It could only describe the emission spectrum of hydrogen.

c)

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

d)

It was disproved by the cathode ray experiment.

10.

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

a)

velocity, position

b)

velocity, energy

c)

position, energy

d)

velocity, speed