  Metal  Characteristic:  Example:  Nonmetal  Characteristic:  Example: What do you know about different elements?

  Physical properties : properties that can be determined without altering the chemical makeup of the material.  Color, density, odor, melting point, boiling point, bendable etc.  Material remains the same after you test for certain physical properties. A.1 PROPERTIES MAKE THE DIFFERENCE

  Kind of chemical changes it undergoes.  Substance doesn’t stay the same after a chemical change.  Ex. Rusting of iron, burning etc.  Combustion – burning, involves oxygen. Chemical properties

 1.Pure metals have a high luster. 2.Surfaces of some metals become dull when exposed to air 3.Nitrogen gas, forms nitrogen oxides at the high temperatures of an operating automobile engine. 4.Milk turns sour if left too long at room temperature 5.Diamonds are hard enough to be used as a coating for drill bits 6.Metals are ductile 7.Bread rises 8.Argon is used to fill light bulbs to prevent the metal filament wire inside the bulb from being destroyed through oxidation. 9.Metals conduct heat and electricity. Physical or chemical?

  What is a concern when manufacturing coins?  Cost, durability, reactivity of metal A.3 properties matter: designing the penny

 1980s copper became too expensive to be used as the primary metal in pennies zinc-plated steel pennies., corroded easily 1982 zinc replaced copper, copper coating. More chemically reactive. 97.5% zinc History of the penny

  Metals – conducts electricity & heat, malleable, ductile  Nonmetals – brittle, bad conductors  Metalloids (properties of metals and nonmetals) A.4 The Chemical Elements

  Mendeleev – arranged according to atomic mass  Mosley – arranged according to atomic number  Periodicity  Pg119  Atomic number - #protons  Atomic mass - #protons + #neutrons  isotopes The Periodic Table

  Alkali  Alkali earth  Transition metals  Metalloids  Halogens  Noble gases  Lanthanides  actinides Groups

  Arrangement of electrons  Metals tend to give electrons  Results in cations What determines properties?

  A.13 It’s Only Money

 Section A Quiz

  Sources and uses of metals: coin, clothing, engines, fertilizer…  Earth’s composition  Atmosphere – N, O, Ar, He, Ne, C  Hydrosphere – water, salt, Mg, S, Ca  Lithosphere – silicates, coal, oil, carbonates, oxides, sulfides,  Mantle – silicates, Mg, Fe  Core – Fe, Ni SecB Earth’s Mineral Resources

  Lithosphere – solid part, chemical resources, petroleum, ore  Ore – naturally occurring rock or mineral that can be mined  Minerals – naturally occurring solid compounds containing the element or group of elements of interest.  Mines:

  Africa – chromium 95%, cobalt 52%, manganese 80%  China – Aluminum 17%  Pg. 136 ques.1-5 World’s Mines

  Ductility – drawn into wires  Brass, bronze  Alloy – mixture of metals melted together  Not very corrosive  Element handbook worksheet Copper

 B.2 Production vs. Use