| A | B |
|---|
| electron | particle which flies around the outside of the atom |
| matter | anything that has mass; takes up space; and occurs as a solid, liquid, or gas |
| states of matter | solid, liquid, gas, and plasma |
| adding heat | can turn a liquid into a gas |
| adding pressure | can turn a liquid into a solid |
| example of a chemical change | Hydrogen and Nitrogen combining to form ammonia |
| example of a physical change | ice melting into water |
| examples of physical properties | color, state, size, texture |
| example of a chemical property | will rust when combined with water |
| proton | has a positive (+) charge |
| atomic number | the number of protons in an element |
| atomic mass | add the number of protons and neutrons |
| "happy" atoms | number of protons = the number of electrons |
| metals | shiny, good conductors, melt easily |
| compound | formed when 2 or more elements join chemically and form a new substance |
| molecule | the smallest piece of a compound |
| atom | the smallest piece of an element |
| formula | the type and number of elements in a compound |
| mixture | when you combine different substances without joining them chemically |
| solution | a mixture where 1 substance dissolves in another |
| suspension | a mixture where 1 substance hangs in another until they separate |
| solute | the part of the solution that gets dissolved (broken into molecule size) |
| solvent | the part of a solution that does the dissolving (ex. the water in kool-aid) |
| concentrated | a strong solution...has a lot of solute |
| dilute | a weak solution...has very little solute |
| nucleus | center of the atom |
| neutron | the particle with no charge |
