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Chemistry
Unit 5
Property of metals
👉High Electrical Conductivity – Metals allow electricity to flow easily due to free-moving electrons.
👉High Thermal Conductivity – Metals efficiently transfer heat.
👉Malleability – Metals can be hammered or pressed into thin sheets without breaking.
👉Ductility – Metals can be stretched into thin wires.
👉Luster – Metals have a shiny appearance when polished.
👉High Density – Most metals have a high mass per unit volume.
👉High Melting and Boiling Points – Many metals require high temperatures to change states.
👉Strength and Hardness – Some metals are very strong and resistant to deformation.
👉Sonority – Metals produce a ringing sound when struck.
👉Corrosion Resistance (Varies by Metal) – Some metals, like gold and platinum, resist rust and oxidation, while others, like iron, corrode easily.
Property of non metals
👉Poor Conductors of Electricity and Heat – Most non-metals do not conduct electricity or heat well (except graphite).
👉Brittleness – Unlike metals, non-metals break easily when subjected to stress.
👉Dull Appearance – Most non-metals lack metallic luster and appear dull (except for some like iodine).
👉Low Density – Many non-metals have lower densities compared to metals.
👉Low Melting and Boiling Points – Most non-metals have lower melting and boiling points (except for some like diamond).
👉Non-Ductile and Non-Malleable – Non-metals cannot be stretched into wires or hammered into sheets.
👉Varied States – Non-metals exist in solid, liquid, and gaseous states at room temperature (e.g., carbon is solid, bromine is liquid, oxygen is gas).
👉Non-Sonorous – They do not produce a ringing sound when struck.
👉High Electronegativity – Non-metals tend to gain electrons in chemical reactions, forming negative ions.
👉Chemical Reactivity – Many non-metals react with metals to form ionic compounds and with other non-metals to form covalent compounds.
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