Alkali Metals -
	Alkali metals are all shiny, soft and highly reactive at STP. Is soft enough for a knife to
	cut through it. The shiny surface often gets tarnished from being exposed to air which causes 
	oxidation so they need to be stored in oil to keep from reacting with the air around it.

	Lithium (Li) - 
	Has the atomic number 3. Is soft, silver-white metal. Under standard conditions it is the lightest
	metal and the least dense solid element. Is very flammable and highly reactive. contact with moist 
	air corrodes the surface quickly to a dull silvery grey.

	Sodium (Na) - 
	Has the atomic number 11. It is a soft, silver-white, and is a highly reactive metal. It does not occur
	in nature, it must be prepared from its compounds. It is the sixth most abundant element in the Earths crust.

	Potassium (K) - 
	Has the atomic number 19. Is soft and silvery-white which oxidizes in air rapidly and is very reactive 
	with water which generates enough energy to ignite the hydrogen emitted in the reaction and burning with 
	a lilac flame.

	Rubidium (Rb) -
	Has the atomic number 37. It is a soft, silvery-white metallic element of the alkali metal group. Is very 
	reactive in its elemental form and like other alkali metals it oxidizes rapidly when exposed to air. 87Rb
	has a half-life of 49 billion years which is more than three times longer than the estimated age of the universe.

	Caesium (Cs) -
	Has the atomic number 55. It is a soft, silvery-gold that has a melting point of 28C which makes it one only
	five elemental metals that is liquid at room temperature. It has is very similar to rubidium and potassium
	both physically and chemically.  

	Francium (Fr) - 
	Has the atomic number 87. It is one of the two least electronegative elements and the other being caesium.
	Francium is very radioactive and decays into astatine, radium and radon.