Extensive properties
a property that depends on the amount of matter in a sample. (mass, volume)
Intensive properties
a property that depends on the type of matter in a sample (density, boiling point, melting point, Hardness)
Examples of physical properties
phase, mass, weight, volume, density, boiling point, melting point, solubility, viscosity
Phases (or called states) of matter (solid, liquid, gas). What about their shape/volume --- particle arrangement.
Solid- definite shape, definite volume
Liquid- no definite shape, definite volume
Gas- No definite shape, no definite volume
Identify physical properties from chemical properties.
Physical Properties: hard, silver, easily shaped
Chemical Property: reacts with hydrochloric acid
What is the difference between a physical and chemical change? How do you know when one occurred? Think of examples.
Physical changes can be reversible and irreversible, whereas, chemical changes are not. in a physical change the composition of the materials retains its original identity but a chemical change produces a new substance with a new chemical composition.
Phy
physical properties
a quality or condition of a substance that can be observed or measured without changing the substance's composition.
chemical properties
the ability of a substance to undergo a specific chemical change
What are the two types of mixtures? Give examples of each.
Homogeneous- a mixture with only one phase, also called a solution
Heterogeneous- a mixture with two or more phases
What are symbols? What are formulas? When should you capitalize letters? What are subscripts
symbol- elements
formulas- compounds
first letter should be capitalized.
Subscripts- proportion of atoms present in that element.
Know the parts of a chemical equation.
Reactants products
Law of Conservation of Mass
Mass is not created nor destroyed in an ordinary chemical reaction
Density pyramid