Properites of metals and non-metals

• Who made an early periodic table?

  Mendeleev
• How are elements arranged in the modern periodic table?

  Elements are arranged in order of atomic number in periods and groups
• What do electronic structures model?

  They model how electrons are arranged in atoms
• What are the properties of metals and non-metals in the periodic table?

  • Metals: Shiny, good conductors of electricity and heat, form basic oxides, lose electrons to form positive ions.
  • Non-metals: Dull, poor conductors of electricity and heat, form acidic oxides, do not form positive ions.
• What happens to metal atoms during chemical reactions?

  Metal atoms lose electrons to form positive ions
• What ion does magnesium form when it burns in air?

  Mg²⁺ ion
• What ion does sodium form when it reacts with chlorine?

  Na⁺ ion
• What is a non-metal?

  An element that is a poor conductor of electricity and heat
• How do the chemical properties of metal and non-metal compounds differ?

  Most metal oxides are basic, while most non-metal oxides are acidic
• What are physical properties?

  A description of the appearance of a substance or how it acts without involving chemical reactions
• What are the melting and boiling points of most metals compared to non-metals?

  Most metals have high melting and boiling points, while most non-metals have low melting and boiling points
• What are the differences in physical properties between metals and non-metals when solid?

  • Metals:
  • Good conductor of electricity
  • Good conductor of heat
  • Shiny
  • High density
  • Malleable
  • Ductile
  • Non-metals:
  • Poor conductor of electricity
  • Poor conductor of heat
  • Dull
  • Low density
  • Brittle
• What is a typical property of metals when solid?

  Good conductor of electricity
• What is a typical property of non-metals when solid?

  Poor conductor of electricity
• What is a typical property of metals regarding density?

  High density
• What is a typical property of non-metals regarding density?

  Low density
• What is a typical property of metals regarding ductility?

  Ductile
• What are the key differences in properties between metals and non-metals?

  • Metals:
  • Shiny, good conductors, high density, malleable, ductile
  • Non-metals:
  • Dull, poor conductors, low density, brittle