negatively charged subatomic particle
positively charged subatomic particle
neutral subatomic particle
protons and neutrons are found here
substance that speeds up a chemical reaction but is not permanently changed
measure of how fast a chemical reaction occurs
chemical reaction in which heat energy is absorbed
chemical reaction in which heat energy is released
matter made up of only one type of atom and cannot be broken down by chemical or physical means
anything that has mass and takes up space
the number of protons in an element
smallest unit of matter that makes up everything
one, two, or three letter abbreviation for elements
chart that shows the elements in order of increasing atomic number
horizontal rows on the periodic table
vertical columns on the periodic table in which the elements have similar characteristics
has characteristics of metals and nonmetals
shiny, malleable, ductile, good conductors
dull, brittle, poor conductors
2 or more substances together in the same place, but their atoms are not chemically combined
type mixture that has an uneven composition (tossed salad)
type of mixture that has an even composition (kool-aid)
mixtures that are composed of substances that mix so completely by dissolving that they cannot be distinguished as separate substance
usually a solid that is in the least amount of a solution
usually a liquid that is in the greatest amount in a solution
the relationship of the amount of solute to solvent
2 or more elements that are chemically combined in a set ratio
state of matter where molecules are tightly packed and vibrates
state of matter where molecules flow past each other easily
state of matter where molecule are barely touching and bounce around
two or more atoms of the same element that have different numbers of neutrons in their nuclei
slows down a chemical reaction
protein that regulates nearly all chemical reactions in cells
where the electrons are located in an atom
