3Properties of Metals Where do you find metals on the periodic table? Left of the stair step lineWhat are main properties of metals?Good conductors of heatGood conductor of electricityAll but Mercury are solid at room temp.
4Properties of Metals Other properties: Luster:Reflect lightMalleableCan be rolled thin into sheetsDuctileCan be drawn into wiresThese properties make metals suitable for use in objects like eyeglasses, computers, and buildings.
13Alkali Metals What group are alkali metals in? They have the same properties as other metals! What properties make them different?Softer than most metalsMost reactive!
14Alkali Metals Why do you think alkali metals are the most reactive? They have only 1 electron to give up to become stable!Since they are so reactive they don’t occur in nature in their element form
15Alkali MetalsWhen an alkali metal reacts with a nonmetal does it have a + or – charge?+ chargeIt has to gain an electron back to get its original electron configuration back
16Uses of Alkali MetalsWe need potassium and sodium compounds to stay healthyLithium keeps chemicals important to mental healthy within a narrow rangeFrancium is rare and radioactiveRadioactive: Nucleus breaks down and gives off particles and energy
17Alkaline Earth Metals Which group are the alkaline earth metals in? Same properties as other metalsCombine easily with other metals so they are not found free in nature
18Alkaline Earth MetalsHow many electrons are in the outer energy level?2 electronsThey combine with nonmetals and lose 2 electrons+2 charge
19Alkaline Earth Metals and Fireworks Magnesium is used to produce the white color in fireworksStrontium compounds produce the redMagnesium is also used in cars, planes, spacecraft, ladders, and bats.Chlorophyll is a magnesium compound that plants need
20Alkaline Earth Metals and Your Body Calcium phosphate makes your bones strongBarium sulfate is used to diagnose digestive problems because it absorbs x-ray radiationRadium was once used to treat cancer
21Transition ElementsTransition metals are what we think of as being actual metals.Iron, cobalt, and nickelOccur in nature as uncombined elements
22Iron Triad What three transition metals make up the iron triad? Iron, cobalt, and nickelAll 3 are used in the process to create steel and other metal mixtures
23Iron Triad Iron is the most widely used of all metals Main component of steel2nd most abundant element in Earth’s crustNickel is added to some metals to give them strengthAlso used to give a shiny, protective coating to other metals
24Copper, Silver, and Gold All 3 were once used to make coins Silver and gold are so expensive they are rarely used in coins anymoreGold stopped in 1993Silver in 1964Coins today are mostly nickel and copper
25Copper, Silver, and Gold Today they are used in: Copper: electrical wiringSilver compounds: when exposed to light they break down and create an image – used for photographs and moviesSilver and gold: Jewelry
26Zinc, Cadmium, and Mercury All three are found in Group 12Zinc: used to coat other metals because of its protective qualityCadmium: Rechargeable batteriesMercury: Used in thermometers, thermostats, switches, and batteries.Only metal that is liquid at room temperaturePoisonous and can accumulate in the bodyPeople have died of mercury poisoning after eating fish in mercury contaminated water
27Inner Transition Metals What are the two groups called?LanthanidesActinidesAll are radioactive and unstable
28Metals in Earth’s Crust Earth’s crust contains many compounds and a few uncombined metals like gold and copperMetals must be mined and separated from their oresMost of our chromium is imported from S. Africa, Turkey, and the Philippines. It is used to harden steel
29Ores Ore: Metal in Earth’s crust that combine with other elements Most are a mixture of a metal compound, or mineral, within a mixture of clay or rockAfter an ore is mined it is the rock is separated from the mineralThen the mineral is converted to another physical formThen the metal is refined to its pure form