# Notes_ Energy Levels and Quantum Numbers

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```					Notes: Energy Levels and Quantum Numbers
Draw a diagram that shows the excitation of an electron and its return to its ground state.

When an electron gets excited and returns to its ground state it emits energy in the form of radiation. Are we

Explain what it means for energy to be “quantized”.

How did the following scientist contribute to the quantum mechanical model?

   De Broglie

   Heisenberg

   Schroedinger

Quantum Numbers
The first quantum number is represented by the symbol _____. The first quantum number gives us

information on the ____________________________________.
The second quantum number is represented by the symbol _______ and has a value limited to

___________________. The second quantum number provides information about the ________________.

Each subshell has a characteristic shape; s = ______________, p = ______________, d =

____________________, and f = ______________________.

The third quantum number is represented by the symbol ______ and has a value limited to ______________.

The third quantum number provides information about the _______________ of the orbitals.

The fourth quantum number is represented by the symbol ______ and has a value of _______ or _______.

The fourth quantum number provides information about the ____________ of the electron.

6p                                                            6p

5d                                                     5d

4f                                                   4f
6s                                                              6s

5p                                                            5p

4d                                                     4d

5s                                                              5s

4p                                                            4p

3d                                                      3d

4s                                                              4s

3p                                                            3p

What are the four quantum numbers for   3s          What are the four quantum numbers for
3s
the following electron?                             the following electron?

n=                                                  n=
2p                                                            2p
l=                                                  l=

2s                      ml =                                    2s          ml =

ms =                                                ms =

1s                                                              1s
Fill in the following chart:

Number of
Possible                                          Maximum
Energy Level                       Atomic Orbitals   Electrons in Each
Subshells                                         Possible
(n)                                 (ml)              Orbital
(l)                                            Electrons
(ms)

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