| A | B |
|---|
| evaporation | liquid to gas |
| melting | solid to liquid |
| boiling | liquid to gas, with added heat |
| freezing | liquid to solid |
| condensation | gas to liquid |
| can fill any size container | gas |
| is a very cold gas | Bose-Einstein condensate |
| hold their own shape | solids |
| multiple atoms behave as one | Bose-Einstein condensate |
| made up of free electrons and ions | plasma |
| symbol | abbreviation for an element |
| family | elements together in a column of the periodic table, share characteristics |
| hydrogen symbol | H |
| isotope | a different form of the same element, has a different number of neutrons |
| inert | doesn't react with other elements |
| noble gases | inert gases found in the last column of the periodic table |
| metal characteristics | shiny, shape can be changed, carry heat and electricity |
| make up 80% of all elements | metals |
| alloy | a mixture of two or more metals |
| atomic mass | tells # of protons |
| mass number | neutrons plus protons |
| nucleus | center of an atom, holds protons and neutrons |
| molecule | the smallest part of a compound |
| compound | two or more elements combined chemically |
| proton | positive charge |
| neutron | no charge |
| electron | negative charge, almost no mass |
| mass | ameasure of the amount of matter in an object |
| density | mass of material per unit of volume |
| weight | measures the downward force of gravity |
| volume | th amount of space an object takes up |
| physical property | can be observed with your senses |
| chemical property | describes how substances interact |
| physical change | a change in a physical property |
| chemical change | results in new matter being formed |
| slicing bread | physical change |
| milk souring | chemical change |
| water's boiling point | physical property |
| gasoline's ability to burn | chemical property |
| determines identity of element | number of protons |
| examples of plasma | lightning, neon signs, Northern lights, fluorescent lights |
| You find the number of neutrons by ... | mass number minus the atomic number |
