6 Elements Periodic Table of the Elements The vertical columns of the periodic table are called groups, or familiesEach group contains elements with similar chemical propertiesThe horizontal rows of elements in the periodic table are called periodsPhysical and chemical properties change somewhat regularly across a period
7 Elements Types of Elements Metal is an element that is a good electrical conductor and a good heat conductorProperties of metalsMost are solids at room temperatureMalleable - they can be hammered or rolled into thin sheetsDuctile - they can be drawn into a fine wireConduct electricity and heat well
8 Alkali Metals:Group 1 in the periodic table. -soft, white, low-density, low-melting point-highly reactive metallic elements-lithium, sodium, potassium, rubidium, cesium, and francium.-one electron in the outermost energy level-never found free in nature.
9 Periodic Table/Elements August 17 How many significant figures does have?How many significant figures should the product of x have?[10 (power 4) (power 4) ] x 10 (power 2)
10 Alkaline Earth Metals: Group 2 in the periodic table. -metallic elementscalcium, strontium, magnesium, and barium, but generally including beryllium and radium.-two electrons in the outermost energy level, readily reactive-never found free in nature.
11 Transition Metals: Any of the metallic elements within Groups 3 to 12 in the periodic table -multiple valences (outermost electron rings)
13 Elements Types of Elements Nonmetal is an element that is a poor conductor of heat and electricityProperties of nonmetalsMany are gasesSolids are brittlePoor conductors of heat and electricity
14 ElementsTypes of ElementsCarbon Sulfur Phosphorus Iodine
15 Elements Types of Elements Metalloid is an element that has some characteristics of metals and some characteristics of nonmetalsProperties of metalloidsAll metalloids are solids at room temperatureSemiconductors of electricity
16 Halogens: Group 17 in the periodic table. -five chemically related nonmetallic elements-fluorine, chlorine, bromine, iodine, and astatine-highly reactive and combine readily with most metals and nonmetals to form a variety of compounds-never occur uncombined in nature.
17 Elements Types of Elements Noble gases are the elements in Group 18 of the periodic table of the elementsProperties of noble gasesGenerally unreactiveGases at room temperature
19 Lanthanide Metals: Elements representing atomic numbers 57–61 in the periodic table. They are shiny metals, similar in reactivity to alkaline earth metals.Actinide Metals: A series of radioactive metallic elements in Group 3 of the periodic table.