chem

• Physical properties


  Properties that can be measured / observed without changing the identity of the material
• Chemical properties


  Properties that can be measured/observed when the substance undergoes a chemical change
• Electrons are not involved in physical properties
• Electrons are involved in chemical properties
• Alkali metals


  • Shiny metallic lustre
  • Malleable and ductile
  • Good conductors of heat and electricity
• Other metals


  • Shiny metallic lustre
  • Malleable and ductile
  • Good conductors of heat and electricity
• Alkali Metals


  • Low melting and boiling point
  • Less dense: floats in water
  • Soft: can be easily cut with a knife