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ChemCom MP1
Chemistry Level 3 Marking Period 1
| Question | Answer |
|---|---|
| What are two or more substances physically combined called? | mixture |
| kilo- | 1000 x basic unit |
| hecto | 100 x basic unit |
| solid | the state of matter that has the lowest energy |
| solid | the phase in which atoms are closely packed together and can only vibrate |
| liquid | the state of matter that has a definite volume but an indefinite shape |
| liquid | the phase in which atoms and molecules can move freely in two dimensions |
| gas | the phase in which atoms and molecules are far apart and move freely in 3-D |
| gas | the state of matter that has both an indefinite shape and volume |
| plasma | the state of matter with the highest energy |
| plasma | the state in which most of the matter in the universe can be found |
| gas | the state of matter that is common on earth and can be compressed easily |
| surface tension | the attraction among particles in liquids |
| freezing | the change of state from a liquid to a solid |
| freezing point | the temperature at which a liquid changes to a solid |
| melting | the change of state from a solid to a liquid |
| melting point | the temperature at which a solid changes to a liquid |
| vaporization | includes both boiling and evaporation |
| boiling | the change from a liquid to a gas that occurs throughout the liquid |
| evaporation | a change from liquid to gas; it occurs only on the liquid's surface |
| boiling point | the temperature at which a liquid changes to a gas |
| condensation | the change from a gas to a liquid |
| compound | two or more elements chemically combined in a definite proportion |
| mixture | Two or more substances that are physically combined |
| physical change | methods used to separate mixtures |
| homogeneous mixture | A mixture that appears the same throughout |
| heterogeneous mixture | A mixture in which separate substances can be seen |
| solution | a homogeneous mixture that appears to have one state of matter |
| suspension | a heterogeneous mixture in which particles settle out by themselves |
| colloid | A homogeneous mixture that is usually white and opaque; does not settle |
| physical properties | Characteristics observed without changing the substance |
| chemical properties | characteristics of how substances react with one another chemical properties |
| changes of state | are ALL physical changes |
| mixtures | substances physically combined in no definite proportion |
| compound | two or more elements chemically combined |
| element | contains atoms of only one type; these are found on the periodic table |
| atom | the smallest piece of an element with all the properties of that element |
| molecule | smallest piece of a compound with all the properties of that compound |
| chemical symbol | the shorthand way scientists write an element's name |
| chemical formula | The shorthand way scientists write a compound |
| chemical formula | Tells what elements and how many atoms of each are in a compound |
| reactants | The substances that come together to react in a chemical reaction |
| products | The new substances that are formed in a chemical reaction |
| reactants | These are shown to the left of the arrow in a chemical equation |
| products | These are shown to the right of the arrow in a chemical equation |
| atoms | are made of protons, neutrons and electrons |
| proton | the massive, positively charged particle in the nucleus of an atom |
| neutron | the massive uncharged particle that is found in the nucleus of an atom |
| electron | negatively charged particle with little mass found outside the nucleus |
| filtration | method used in the foul water lab that removed large solid particles |
| saturated solution | solution that has the maximum amount of solute possible |
| unsaturated solution | solution with less than the maximum amount of solute |
| supersaturated solution | A solution with more than the maximum amount of solute |
| ions | Charged atoms;they have different numbers of protons and electrons |
| acids | substances that contain an excess of H+ ions |
| bases | substances that contain an excess of OH- ions |
| acids | pH less than 7 |
| bases | pH more than 7 |
| pH | a measure of the concentration of H+ ions |
Created by:
phuddles
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