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Physics9

Notes on physics.

QuestionAnswer
Element A substance that cannot be seprated or broken down, stoms of different elements are different. It is a pure substance.
Chemical Symbol A short hand way to represent the elements. Ex. Oxygen= O Sodium= Na
Metals Almost all solids, that conduct heat and electricity well, shiny/ luster, most elements are metals.
Nonmetals Poor conductors of heat and electricity, dull, gases or brittle solids.
Mettaloids Has properties of metals and nonmetals, also called a semiconductor.
Compounds Pure substance that is made up of more than one kind of element, chemically combined, properties are different than the element that make it up.
Molecule Smallest particle of a compound.
Chemical Formula Combination of chemical symbols representing chemical supstances.
Mixture Teo or more substances combined but not chemically bonded. Ex. Salt water, pizza, koolaid.Can be seperated,ratio can change, each substance has its own specific properties.
How can you seperate mixtures? Picks apart, filter, evaporation, distillation,magnet, centrifuge.
Heterogeneous Mixture Least mixed, Large particles, easily seperated.
Homogenous Well mixed, appears the same throughout, very small particles, do not settle out.
Solution type of homogenous mixture, one substace is dissolved in another. Best mixed.
Solute the substance that gets dissolved.
Solvent Substance that does the dissolving- the larger amount. particles are too small to scatter light.
Alloy A solution of metals- a solid is dissolved in a solid.
Colloid Particles are relatively large, mixed together but not dissolved, particles are permanently suspended, will not seperate. Ex. Milk, Toothpaste
Tyndall effect scatter light- appears cloudy.
Suspension Particles are large enought to settle out. Ex. Italian Dressing, Snow globe.
Alumminum Al
Gold Au
Copper Cu
Created by: mackenziedavis
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