Properties 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, gain electrons to form negative 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 characterizes non-metals in chemical reactions?

  Non-metals do not form positive ions
• What are the differences in chemical properties between metal and non-metal compounds?

  • Most metal oxides are basic.
  • Most non-metal oxides are acidic.
• What are physical properties?

  Physical properties describe the appearance or behavior of a substance 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 typical physical properties of metals and non-metals when solid?

  Properties of metals:

  • Good conductor of electricity
  • Good conductor of heat
  • Shiny
  • High density
  • Malleable
  • Ductile

  
  

  Properties of non-metals:

  • Poor conductor of electricity
  • Poor conductor of heat
  • Dull
  • Low density
  • Brittle
• What is a typical characteristic of metals regarding conductivity?

  Metals are good conductors of electricity
• What is a typical characteristic of non-metals regarding conductivity?

  Non-metals are poor conductors of electricity
• How do metals typically appear when solid?

  Metals are shiny
• How do non-metals typically appear when solid?

  Non-metals are dull
• What is the density comparison between metals and non-metals?

  Most metals have high density, while most non-metals have low density
• What is the malleability of metals compared to non-metals?

  Metals are malleable, while non-metals are brittle
• What is the ductility of metals compared to non-metals?

  Metals are ductile, while non-metals are brittle
• What is the typical physical property of metals regarding heat conductivity?

  Metals are good conductors of heat
• What is the typical physical property of non-metals regarding heat conductivity?

  Non-metals are poor conductors of heat