The Periodic Table

The Periodic Table Content Alkali Metals Physical Properties of Alkali Metals (Group I) - Soft and easily cut with a knife - Low melting and boiling point - Low density - Good conductors of electricity and heat - Shiny and silvery in color Chemical Properties of Alkali Metals (Group I) S/N Property 1 Alkali metals react with water to form a soluble metal hydroxide (alkali) and Hydrogen gas e.g. 2𝐾(𝑠) + 2𝐻2𝑂(𝑙) → 2𝐾𝑂𝐻(𝑎𝑞) + 𝐻2(𝑔) 2 Alkali metals react with oxygen to form a metal oxide (basic oxide) and Hydrogen gas e.g. 4𝐾(𝑠) + 𝑂2 (𝑔) → 2𝐾2𝑂(𝑠) Trends down the group - Melting and boiling points decrease - Reactivity of the alkali metal increase Halogens (Group VII) Physical Properties of Halogens - Colored non-metals - Exist as diatomic molecules - Low melting and boiling points Chemical Properties of Halogens S/N Property 1 Metals react with halogens to form a class of compounds called metal halides 2 A more reactive halogen will displace a less reactive halogen from its compound e.g. 2𝐾𝐵𝑟(𝑎𝑞) + 𝐶𝑙2 (𝑎𝑞) → 𝐵𝑟2(𝑎𝑞) + 2𝐾𝐶𝑙(𝑎𝑞) Colors of Halogens Halogen Color and state Fluorine Pale Yellow Gas Chlorine Greenish yellow gas Bromine Red-brown liquid Iodine Black solid Astatine Black Solid Specific to this group compared to other metals

Noble Gases (Group 0) Physical Properties of Noble Gases - Colorless gases - Monoatomic in most conditions Chemical Properties of Noble Gases S/N Property 1 Noble gases are inert (generally unreactive) Explanation →Noble gases have a full valence shell hence do not need to gain, lose, or share electros with other elements Uses of noble gases Noble Gas Use Helium Fill balloons Neon Used in advertising lights Argon Filling light bulbs Transition Metals Properties of Transition Metals - High melting and boiling point - High densities - Variable Oxidation states - Form colored compounds - Are good catalysts Test yourself 1. What are the physical properties of Alkali Metals? 2. What are the chemical properties of Alkali Metals? 3. What are the physical properties halogens? 4. What are the chemical properties of halogens? 5. What are the physical and chemical properties of Noble Gases? 6. Why are noble gases inert? 7. What are uses of Noble Gases? 8. What are the properties of Transition Metals?