Chemistry chapter 1

pure substance made of only 1 kind of atom

pure substance made from atoms of 2 or more elements

energy is never created or destroyed in any reaction

same throughout (salt water)

different throughout (italian dressing)

1. has mass 2. has volume

measure of amount of matter

weight involves gravity pulling down

extensive and intensive

depends on amount of matter present

does not depend on amount of matter present

describes a substance, not how substance changes

substance changes into a different substance

length-meter, mass-gram, temperature-kelvin, time-second, amount of substance-mole

must be calculated (volume, concentration, area, density, energy, molar mass)

horizontal rows

vertical columns