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Elements
•__________make up elements•Elements are the simplest
__________ substances (ex. Hydrogen, Helium, Oxygen); can’t be broken down by chemical means–92 naturally occurring; Earth’s crust is mostly Oxygen and Silicon
Compounds
•Compounds are pure substances that are formed when _____________ ________________________
•Ex. Water – made up of 2 atoms of Hydrogen and 1 atom of Oxygen; all water molecules have the same properties
• Combo of two or more substances; are _________ but not ___________ combined
• May be separated by physical means- evaporation, filtration, magnets, picking out pieces, etc.
• Exist in any phase- liquids (ethanol & gas); liquid/gas (Coke®); solids (taco salad); gas/solid (smoke)
What’s a Mixture??
Heterogeneous mixture
-________________ throughout; “least mixed”
-_____________ particles
-easier to separate
-examples: salad dressing, your sock drawer, cereal, sand, rocks, soil
Homogeneous Mixture
• “__________________”• Examples include: glass, iced
tea, stainless steel, smoke, toothpaste
A Type of Homogeneous Mixture…
•Solutions- “best mixed;” made of a substance that is dissolved (________) and a substance that does the dissolving (_________)– In other words: the solvent dissolves the solute
Examples: lemonade, coffee, soda, ocean water, dental filling
Did You Know….
….that not all solutions are liquids?
•___________- metal solutions that are solids dissolved in solids (ex. Gold jewelry is gold and copper dissolved together)