Vocab

Mixture: combination of two or more pure substances.

Heterogeneous mixture: mixture that does not blend smoothly.

Homogeneous mixture: mixture that does blend smoothly

Solution: homogeneous mixture

Filtration: uses a porous barrier to seperate a solid from a liquid

Distillation: seperation technique that users different boiling points

Crystallization: seperation technique that results in the formation of pure solid particles of a substance

Chromotography: technique that seperates the components of a mixture on the basis of the tendency to travel

Element: pure substance that cannot be seperated into simpler substances

Periodic Table: table that organizes elements into a grid if horizontal rows and vertical columns

Compound: combination of two or more different elements

Law of Definite Proportions: regardless of the amount, compound is always composed of the same elements in the same proportion

Percent by Mass: total mass of the compound as a percentage

Dalton's Atomic Theory: atoms cannot be destroyed or created

Atom: smallest part of an element that still retains its properties

Cathode Ray: Ray of radiation that originated from the cathode end of a tube

Electrons: negatively charged particles

Nucleus: central location that holds all the positively charged particles

Proton: has a positive charge of 1+

Neutron:  mass equal to a proton, no electrical charge