The Periodic Table

• metalloids


  elements with properties of both metal and non-metals
• rows


  periods
• columns


  groups
• Elements in the same group are put together because they have similar properties.
• Word Equation for Alkali Metals:

  • Alkali Metal + Water --> Metal Hydroxide + Hydrogen
• Metal alkalis are stored in oil to minimize the contact with oxygen and water (moisture).
• Group 1 metals are called alkali metals because the solution turns blue/purple when the universal indicator is added.
• halogens


  non-metals in group 7
• Displacement Reaction


  when a more reactive halogen replaces a less reactive halogen in a compound
• Noble gases glow brightly when high-voltage electricity passes through them.
• Helium has a lower density than the air.
• Argon is a better insulator than air.
• Noble gases are unreactive (according to scientists)