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Chapter 3 – Elements, Mixtures & Compounds. Chapter 3 – Section 1. _____________ = pure substance that can not be separated into simpler substances by physical or chemical means ______ ________________ = only one type of particle.
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Chapter 3 – Section 1 • _____________= pure substance that can not be separated into simpler substances by physical or chemical means • ______ ________________= only one type of particle
Each element has unique properties that allow us to identify them • Physical properties that help us identify: D__________, M____, B____, or H_________ (called ______________ __________ of matter) • Also chemical properties
Elements put into groups, whether or not they share enough common properties. • If you know what category something is found in, then you should know some properties of that substance.
Metals - ____________ - good conductors of e________ and t_________ ___________ - __________________ - _____________ - many uses throughout daily life
Nonmetals - ________ - ______ conductors - _____________ - ___________________ - not very common
Metalloids (aka Semiconductors) - properties of _________ - some are shiny / some dull - ___________ malleable and ductile - Silicon, Antimony & Boron
Section 2 - Compounds • Compounds = _______ ______________ composed of 2 or more elements that have been _______________ ______________ (C&C) - they must undergo a chemical change - Not random; specific ratio of components - Unique set of properties that are different from the elements’ properties
Can be broken down into simpler substances (elements) • ONLY through chemical changes NOT physical changes • Compounds are everywhere • P__________ = found in many things, so vital to life • _______ or _________is a compound • Manufactured compounds help many things
Section 3 - Mixtures • Mixture = combo of two or more substances that are NOT __________ _______________ - Substances retain _______________ - Can be _________________ separated - Examples = distillation, magnet, or centrifuge - No ____________ _________
Solution = a mixture that appears as one single substance, but is composed of two or more that are evenly distributed (homogenous) - __________ = substance dissolved - __________ = the substance in which the solute is dissolved - Soluble vs Insoluble - Particles are extremely small, never settle out nor filter out
____________= Amount of solute in a solvent - Acid example - Concentrated or Dilute - Saturatedvs Unsaturated
Solubility = Amount of _________needed to make a saturated solution, using a given amount of _____________ - Methods to dissolve faster 1) M_______ 2) C_________ 3) H__________
Suspensions = mixture in which particles are dispersed, but DO settle out - Particles are_____________ • ________________= mixture in which particles are dispersed, but do NOT settle out - Well mixed and small particles - Examples = Milk, mayonnaise, stick deodorant, gelatin & whipped cream - Large enough to scatter light - No filtration
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