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Electrons

Who solved the photoelectric effect problem?

Einstein

$1

Can a electron be considered a wave and a particle? Who stated this?

Yes, DeBroglie

$1

What is the photelectric effect?

When light shines on a metal, and only ejects electrons at a

threshhold wavelength (or frequency)

$3

What is Hund’s rule?

Electrons fill up orbitals at same energy level one at a time, before doubling up

$2

What does the Pauli Exclusion principle state?

Only two electrons per orbital and they must have opposite

spins

$2

According to the Aufbau principle, how do electrons

enter orbitals?

In the lowest energy orbitals first (ie. 1s, then 2s, etc.)

$2

What does the Heisenberg Uncertainty principle have to say

about electrons?

You can’t know the position and velocity (speed and direction) of

an electron at the same time

$2

Which element has the electron configuration

1s22s22p63s23p64s23d104p3?

Arsenic, As

$2

Can you name a 5A anion (group 15) that has the following electron

configuration1s22s22p63s23p64s23d104p6?

Arsenide, As3-

$2

What happens when an electron goes from an excited state back

down to its ground state?

A characteristic color is emitted depending on the atom

$3

$4

Name the diatomic elements.

hydrogen - have nitrogen – no fluorine - fear oxygen - of iodine - ice

chlorine - cold bromine - beer

Who is mostly responsible for developing the quantum

mechanical model of the atom?

Erwin Schrodinger

$1

What are the letter symbols for the four orbitals?

s,p,d,f

$1

What are the maximum number of orbitals in the

s,p,d & f sublevels?

1,3,5,7

$2

What are the maximum number of electrons in the

s,p,d & f sublevels?

2,6,10,14

$2

Wavelength (l) = ?

c/ n(Do you know the units for these

three numbers?)

$1

Energy = ?

h x n(Do you know the units for these

three numbers?)

$1

What is a photon?

An elementary particle that carries a quantum of light and all other forms of electromagnetic radiation

$2

Which has a larger frequency, gamma rays or radio waves?

gamma rays

$1

Which has a larger wavelength, gamma rays or radio waves?

radio waves

$1

Which has more energy, gamma rays or radio waves?

gamma rays

$1