Presentation on theme: "Unit 9E/F Lesson Two We Need Metals Part 2 Objectives: to learn the properties of metals, what alloys are, the difference between metals and non-metals,"— Presentation transcript:
Unit 9E/F Lesson Two We Need Metals Part 2 Objectives: to learn the properties of metals, what alloys are, the difference between metals and non-metals, and the names of non-metallic elements. Targets 1 and 2
Work to Do Read pages 16 and 17. Copy table 1 page 17. Complete questions 2, 3, and 6. Complete C2E2 as a class. Correct Homework Homework: Homework sheet 2.1 Homework sheet 2.1 Keywords: Keywords: phosphorus, silicon, tarnish, graphite, tough, manganese, ductile, stainless steel Boardworks: Metals vs. Non-metals
Points to Remember CharacteristicMetalsNon-Metals Melting PointMelt at high temperatures.Melt at low temperatures. SoundSonorous (they ring when struck) Do not ring. Heat ConductivityConduct heat well.Poor heat conductors. Electrical ConductivityGood conductors of electricity. Poor conductors of electricity. (Graphite is an exception.) BrittlenessMetals are flexible (the bend), they are ductile (can be drawn into wires), are malleable (can be hammered into sheets). When non-metals are solid they break easily. Surface TextureMetals are shiny.Non-metals are dull. MagnetismIron, nickel, and cobalt are magnetic. Non-metals are not magnetic. Tensile StrengthMost metals are quite strong. Most non-metals are very weak. HardnessMetals are usually hard.Non-metals are usually soft.