Elements make up elements Elements are the simplest

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Elements • _____make up elements • Elements are the simplest _____ substances (ex. Hydrogen,

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

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

What’s a Mixture? ? • Combo of two or more substances; are _____ but

What’s a Mixture? ? • Combo of two or more substances; are _____ but not ______ combined • May be separated by physical meansevaporation, filtration, magnets, picking out pieces, etc. • Exist in any phase- liquids (ethanol & gas); liquid/gas (Coke®); solids (taco salad); gas/solid (smoke)

Heterogeneous mixture -________ throughout; “least mixed” -_______ particles -easier to separate -examples: salad dressing,

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

Homogeneous Mixture • “_________” • Examples include: glass, iced tea, stainless steel, smoke, toothpaste

A Type of Homogeneous Mixture… • Solutions- “best mixed; ” made of a substance

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

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)