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| Pregunta | Respuesta |
| Energy Level 1 | 2 Electrons |
| Energy Level 2 | 8 Electrons |
| Energy Level 3 | 18 Electrons |
| Energy Level 4 | 32 Electrons |
| Why are the noble gases unreactive? | They have all their valence electrons |
| Physical Change | affects size, shape and state of matter. ex) water boiling or dew forming |
| Chemical Change | Results in the formation of a new substance that has brand new properties then the original. ex) wood burning or eggs cooking |
| Scientific law, requires us to balance chemical equations | Law of conservation of mass |
| Law of Conservation of Mass | "the mass of the products is always the same as the mass of the reactants" |
| Reaction where energy is absorbed | Endothermic Reaction |
| Reaction where energy is released | Exothermic Reaction |
| Activation Energy | Energy needed to start the reaction |
| Temperature | Increase- speeds up reaction Decrease- slows down the reaction |
| Concentration | Increase- speeds up reaction Decrease-slows down reaction |
| Particle Size | Increase- slows down the reaction Decrease- speeds up reaction |
| Catalyst | Speeds up the reaction ex)enzyme |
| Inhibitor | Slows down the reaction, ex)BHT |
| Examples | Exothermic- hand warmer Endothermic-ice pack |
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