# Chemistry

## 26 terms

### De Broglie

hypothesized that it would be possible for particles to have properties of waves

### Momentum

is the product of the object's velocity multiplied by it's mass

### Heisenburg

hypothesized that it is impossible to know both the exact location and the exact momentum of an object at the same time

there are 4

### Shroedinger

gave us the wave equation for describing the electron

### Max Born

gave us the physical interpretation of the wave equation

### n

describes energy levels; also related to size

spin of electron

### l

describes sub-levels; shape related

### m

describes orbitals; direction in space

### deBroglies Equation

wavelength= Planks Constant / mv

### 2n^2

used to find the max number of electrons in an energy level

### Newtonian Mechanics

aka classical mechanics: describes the behavior of visible objects traveling at ordinary velocities

### Quantum Numbers

4 used in Schrodinger's description of electron behavior

### Degenerate

Orbitals that are alike in size and shape and differ only in direction have the same energy and are said to be _______

### Electron Cloud

The volume in which an electron is likely to be found

### Heisenburg Uncertainty Principle

states that there is always some uncertainty about the position and momentum of an electron

### Wave-particle duality of nature

the idea of the two-sided nature of waves and particles

### Sublevel

one of the many energy states group closely together to form an energy level

### Quantum Mechanics

the behavior of extremely small particles traveling at velocites near that of light

### Principal Quantum Number

represented by letter n

### Pauli Exclusion Principle

states that no two electrons in an atom have the same set of four quantum numbers

### Orbital

is the space occupied by a pair of electrons

### Valence Electrons

electrons in an atoms outermost orbital

### Aufbau Principle

each electron occupies the lowest energy orbital available

### Hund's Rule

single electrons with the same spin must occupy each equal-energy orbital before additional electrons w/ opposite spins can occupy the same orbitals