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midnight
7th grade chemistry
| Question | Answer |
|---|---|
| absolute zero | the temperature at which all molecular motion stop |
| amorphous solid | a solid that is , when the molecules in the liquid slowly stop movie but do not corm any type of pattern |
| atomic mass unit | the average mass of one proton or one neutron |
| atomic number | the number of proton found in the nucleus of an atom |
| boiling | change from a liquid to a gas is happening withing the liquid and not just at the surface |
| chemical change | a change that occurs at the molecular level when the process is don e there is a totally new substance with properties and characteristies |
| chemical properties | properties of matter that can not be observed or measured without changing the substance |
| condensation | the change of state where energy is lost and molecules no longer have enough energy to fly around,making them come together they can still flow past one another but they can not break free |
| crystalline solid | a solid that is formed when the molecules in the liquid slowly stop moving and arranged themselves i a regular, repeating pattern |
| density | a physical property of matter that describes how much matter can be found in a given volume |
| electron | negatively charged particle that is found zipping around the outside of an atom, responsible for holding and creates the volume of an atom |
| endothermic | a chemical reaction in which energy is absorbed will feel cold to the volume of an atom |
| evaporation | the change of state where the molecules at the surface of a liquid are gaining enough energy to break away even if the needed temperature is not reached |
| exothermic | a chemical reaction in which energy is released usually in the form of heat,light |
| family or group | words used to identify a column on the periodic table |
| fluid | the word used to describe any substance whose molecules are able to flow past one another |
| freezing | the change of state where energy is lost and molecules be one fixed in a position no longer able to go freely past one another |
| ion | word used to describe an atom that has gained or lost an electron resulting in an electric charge |
| isotope | word used to describe an atom that has a different number of proton and neutron in the nucleus |
| law of conservation of mass/matter | this law states that matter can not b created or destroyed it will only change the arrangement of all the molecules but there will not be more less |
| melting | good conductors of heat and electricity they are ductile and malleable and tend to found as solids at room temperature |
| metal | good conductor of heat and electricity |
| metalloid | element that have properties of both metals and non-metals |
| period | a row on the periodic table |
| solubility | the amount of one substance that will dissolve into another substance |
| sublimation | when molecules at the surface of a solid gain enough energy to change directly to a gas, by passing the liquid state |
| vapor | word used to describe a gas that is usually found in a liquid at room temperature |
Created by:
midnightt
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