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Properties of Metals and Non metals

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latesha wilkins

on 11 October 2012

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Transcript of Properties of Metals and Non metals

Properties of Metals
and Nonmetals Physical Properties of Metals Alkaline Earth Metals Transition Metals includes 7 elements Mixed Metals Lanthanides SHININESS, MALLEABILITY, DUCTILITY, CONDUCTIVITY Metals react by losing electrons Chemical Properties of Metals https://www.youtube.com/watch?v=UMqPKQKamhk https://www.youtube.com/watch?v=sS3cIK9jlB8 https://www.youtube.com/watch?v=3dqRzvk2GwY&feature=fvwrel Alkali Metals Found only in cmpds Most reactive metals Shinny and soft ex) Na-used in foods; found in seawater
K-found in foods; Li- batteries; meds fairly hard gray white good conductors React by losing 2 electrons 2nd most reactive
metals Mg and Al makes a light wt material good conductors hard shinny mkes colorful cmpds Why is iron important to humans? the most are found in grp 13 Al, Sn, Pb Why is lead not used in paints
anymore? shinny malleable soft high conductivity used to make alloys used in lamps, lasers, magnets, motion picture projectors Actinides all elements heavier than U are made in the lab unstable created in labs Synthetic Elements created when a nuclear particles of 1 element are forced to crash into another element's nuclei Curium 1st synthetic element made poor conductors Properties of Non METALS reactive with other elements solid non metals are dull and brittle many are common on Earth Physical Properties of Nonmetals Bromine (Br) only nonmetal that is liquid dull brittle lower densities than metals good insulators most nonmetals are gases readily form compounds Chemical properties of nonmetals F is the most reactive element known N. Gases non reactive usually gain or share electrons Families of Nonmetals Carbon family gain lose or share 4 electrons Nitrogen Family gain or share 3 electrons diatomic molecules Phosphorus used to make matches Oxygen Family diatomic or triatomic molecule 3 nonmetals 2 nonmetals Halogens "salt-forming" very reactive Noble gases nonreactive all exists in Earth's atmosphere Metalloids brittle, hard all are solid @ room temp semiconductors
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