Chemistry
Physical Property
Property that can be observed or measured
Compound
Pure substance made up of atoms of two or more different elements joined by chemical bonds
Homogeneous Mixture
A mixture in which the composition is the same throughout
Millikan
- Oil drop experiment
- Discovered the CHARGE of an ELECTRON
Dalton's 5 Laws:
- Atoms make up everything
- Atoms of a given element are identical
- Chemical reactions involve the rearranging of atoms
- Atoms cannot be created or destroyed
- Atoms of different elements can combine and form compounds
Chemical Property
Property of a substance to undergo a specific chemical change
Molecule
A group of atoms bonded together
Heterogeneous Mixture
A mixture in which different materials can be distinguished easily
Rutherford
- Gold foil experiment
- Discovered nucleus
Proton
- Located in nucleus
- Positive charge
- 1 AMU
Extensive Property
A property that depends on the extent or size of a system
Physical Change
A change of matter from one form to another without a change in chemical properties
Democritus
- Created the idea of "atomos" or atoms that make up everything
Bohr
- Planetary model
- Energy levels
Neutron
- Located in nucleus
- NO Charge
- 1 AMU
Intensive Property
A physical property that remains the same no matter the amount of a substance
Chemical Change
A change in matter that produces one or more new substances
Dalton
- Had 5 laws about atomic theory
Chadwick
- Discovered neutrons
Electron
- Located in electron cloud
- Negative Charge
- 0 Mass
Element
A pure substance made of only one kind of atom
Law of Conservation of Mass
Matter is neither created nor destroyed
Thomson
- Discovered the electron
- Plum Pudding Model
- Cathode Ray Tubes
Schrodinger
- Electron cloud model
Atomic Number
The number of protons/electrons in an atom