Terms in this set (23)
Anything that has a mass and takes up space
ex. ping pong ball vs. golf ball
matter with uniform and definite composition
*all samples of a substance have identical physical properties
A characteristic of a pure substance that can be observed or measured without changing the substance's composition ex. color, melting point, boiling point, etc.
States of Matter
1. solids: have a definite shape and volume
2. liquids: have definite volume but not shape (take shape of container they are in)
3. vapor/gas: gasses that at room temp are liquids or solids (take shape and volume of container they are in)
2 or more substances that aren't chemically combined
a change to a substance that doesn't change its chemical composition
ex. cutting, grinding, boiling, freezing, etc.
A mixture in which pure substances are evenly distributed throughout the mixture.
A mixture in which pure substances are unevenly distributed throughout the mixture.
used when you have a solid and a liquid mixture--> like using a strainer to separate pasta from H20
used when you have a solid and liquid or a substance dissolved in a liquid
used when both substances are liquids. Takes advantage of the different boiling points of the 2 liquids in the mixture
single element or compound
History of Periodic Table
How Moseley and Mendeleev
ion that is positively charged
ion that is negatively charged
an atom that has gained or lost one or more electrons. two types of ions- cations and anions
Ionic or Covalent --> nonmetal + nonmetal
mixtures (alloy) --> metal + nonmetal (called a salt)
lose electrons (to be stable)
gaining electrons (to be stable)
lose or gain electrons
The average mass of the atom of istopes
The weight of protons and neutrons