| A | B |
|---|
| change of state | change of a substance from one physical form to another |
| melting | solid to liquid-endo |
| boyles law | fixed amount of gas at a constant temp, volume of gas increases while pressure decreases ex:when diver blows a buble, it gets bigger as it nears the surface because the pressure decreases. |
| charles law | fixed amounto of gas at constant temp, volume increases as temp increases ex: when ballon gets hot, it will pop because the volume is increasing. |
| freezing | liquid to solid-exo |
| vaporization | liquid to gas-endo |
| condensation | gas-liquid-exo |
| sublimation | solid-gas-endo |
| boiling | vaporization that occurs throughout a liquid |
| evaporation | vaporization that occurs at the surface of a liquid below its boiling point |
| endothermic | physical or chemical change when energy is absorbed |
| exothermic | physical or chemical change when energy is released |
| how energy changes as changes of states change | when energy taken away particles move slower nd temp drops, so the colder it is, the less energy it has |
| how pressure affects boiling point | because the more pressure, the quicker the particles move, so the higher the tethe atmospheric pressure is lower at higher elevations, so liquid boils at a lower temp. |
| #protons= | #electron, =atomic# |
| protons+neutrons= | atomic mass |
| ion | atom that has different number of protons and electrons |
| positevly charged ion | when protons out number electrons |
| negatively charged proton | when electrons out number protons |
| isotope | atoms w/ same number of protons, but different number of neutrons |
| why nucleus is most dense part of atom | because the protons and neutrons are there, and that is most of the atoms mass |
| protons | pos |
| neutrons | neutral |
| electons | negative |
| nucleus | positevly charged region in middle of atom, very dense |
| mass number | sum of protons and neutrons |
