Quantum Mechanical Model Guided Notes – Part One
•
Certain properties of matter can only be explained using a ________________ model.

Example -
•
In 1924, ________________ developed an equation that predicts that all moving objects have _____________ behavior.
•
These wave properties are significant when particles are extremely ______________ (such as _______________).
•
Like light, electrons exhibit a ________________ nature.
•
Quantum mechanics describes the motions of subatomic particles and atoms as _______________.
•
Later, ____________________ concluded that it is impossible to know exactly both the ____________ and the ____________ of
an electron or any other particle at the same time. (Heisenberg _______________ principle)
•
In 1926, ________________ devised a mathematical equation that treated _______________ in atoms as waves.
•
The modern description of the electrons in atoms, the ________________________ model, comes from the mathematical
solutions to the Schrödinger equation.
•
The quantum mechanical model determines the allowed _______________ an electron can have and how likely it is to find the
electron in various ________________ around the nucleus.
•
These regions of space in which there is a high probability of finding an electron are known as _______________ or
electron _______________.
•
In the quantum mechanical model, the probability of finding an electron within a certain volume of space surrounding the
nucleus can be represented as a ____________________.
•
The total number of orbitals that exist in a given energy level or shell is equal to the energy level number ________________.
1st energy level = __________ orbital
2nd energy level = __________ oribitals
3rd energy level = __________ orbitals
4th energy level = __________ orbitals
•
Orbitals can have different ____________________.
•
Number of different shapes in each energy level is equal to _________________________________.
1st energy level
__________ shape
2nd energy level
__________ shapes
3rd energy level
__________ shapes
4th energy level
__________ shapes
•
Different shaped orbitals occupy their own specific _________________ within an energy level.
•
These are known as __________________.
1st energy level
__________ sublevel
2nd energy level
__________ sublevels
3rd energy level
__________ sublevels
4th energy level
__________ sublevels
•
____________________ are used to describe the shape of different orbitals.
•
First energy level – only one type of orbital

___________ orbital
_____________ shaped orbital

•
The first energy level composed of one sublevel – called the ________ sublevel.
Second energy level – _________ types of orbitals

s orbital
In what way is the s-orbital in the second energy similar to the s-orbital in the first energy level?
In what way is the s-orbital in the second energy different from the s-orbital in the first energy level?

The second type of orbital is called a _______________.
p-orbitals look like _______________________

•
•
Second energy level composed of ________ sublevels – ______ and the _____ .
Third energy level – ________ shapes – ________ sublevels

s-orbital – ___________

p-orbital – ___________

______ orbital – ___________________________________

The third energy level composed of ____________ sublevels – _____, _____, and the _____.
Fourth energy level – _______ shapes – ______ sublevels

s-orbital

p-orbital

d-orbital

_____ orbital – ___________ shape

The fourth energy level composed of ____________ sublevels – _____, _____, _____, and the _____.