group 1

• what is the one element in group 1 not considered an alkali metal

  hydrogen
• talk about the reactivity

  it increases down the group, the element wants to lose an electron to be stable and to have the same configuration as the noble gases
• whyis it easier to lose an electron

  the electrostatic forces are weaker further away.
• what else happens down the group

  melting and boiling point decreases and theyre soft so they have low densities
• whatb happens due to their reacitvity

  they very reactive and eager to lose an electron so they often bond to non metals to lose their electron eg. sodium chloride.
• what colour are these bonds between the group 1 metals and non metals

  usually white solid which can dissolve in water to be colourless
• what happens when they react with chlorine gas

  they react vigorously forming a white metal chloride salt
• as potassium is more reacitve...

  it will react the quickest
• why is argon used in the lab

  to have a safe environemt for experiments because its an inert gas and wont react a lot, it is also used for light bulbs.
• alkali metals react with water to create

  hydrogen gas and metal hydroxides
• what can be observed

  effervescence (bubbles and fizz)
• what is the ph of the hydroxides formed

  theyre alkalie ph above 7
• alkalis react with oxygen to make...

  metal oxides
• this produces a layer of

  dull tarnish
• the more reactive the alkali...


  (the further down the group) and the faster it will tarnish. theyre usually stored as oils to prevent this.