metals and nonmetals.pptx grade 8 science

metals and non metals elements

1. Metals & Non-metals Comparing Properties

2. One Two Three State where metals and non-metals are located in the periodic table. Describe the differences in properties in metals and non-metals. Explain metal properties in terms of electrons. Learning Points

3. Metals Metals & the Periodic Table Metals are located on the left hand side and in the middle of the periodic table. The elements in group 1 and 2 are metals, as well as the transition metals in the middle.

4. Non-metals & the Periodic Table Non-metals are located on the right hand side of the periodic table. Non-metals Non-metals can be found in the earlier periods in groups 4 to 7. All of group 0 are non-metals.

5. Copper Metal Examples Iron Zinc Gold Potassium Sodium

6. Oxygen Non- metal Examples Nitrogen Carbon Neon Boron Helium

7. Good electrical conductors Good heat conductors Shiny (lustrous) High density Malleable Ductile Metals Poor electrical conductors Poor heat conductors Dull in appearance Low density Brittle Comparing Properties Non-Metals

8. + + + + + + + + The key properties of metals, are due to their specific structure. Metal Structure Positive metal ions Delocalised electrons

9. + + + + + + + + Metals are good conductors of electricity. Conductivity Delocalised electrons are free to move around. When they move around, they carry electrical charge. Reason

10. + - Metals have a high melting point. Melting Point There is a strong electrostatic attraction between the delocalized electrons and the positive metal ions. A large amount of thermal energy is required to overcome this. Reason

11. + + + + + + + + Metals are malleable. They can be hammered into shape. Malleability The metal atoms (or ions) slide over each other when a force is applied. This allow metals to change shape on impact. Reason

12. + + + + + + + + Metals generally have a shiny (lustrous) appearance. Shiny Appearance Metals have delocalised electrons on the surface which reflect light energy. Reason

13. Thank you for listening! Metals and Non-metals

14. Press these keys whilst in present mode! B = Blur C = Confetti D = Drumroll O = Bubbles Q = Quiet U = Unveil 0-9 = Timer Keyboard Shortcuts