THE PERIODIC TABLE
it's elementary, my dear Watson
A little history:
Alkali Metals
*most reactive
*one valence electron
*only found when bonded
*reacts violently with water
*low melting point
*found in salt, gas, grease, batteries and fertilizer
Alkaline Earth Metals
*2 valence electrons
*not free in nature
*high melting point
*dissolve in low temperatures
*react with water (2nd most reactive)
* high density
*found in fireworks, cancer treatments and alloys
Transition metals
*groups 3-12
*good conductors*strong and hard
*bond with oxygen
*conduct electricity
*widely varying properties
*found in rings, screw and pennies
BCNO family
*most diverse
*reactive but selective when bonding
*found in weapons, glass making, and soap
Lanthanides
*reactive
*produce sparks
* also transition metals
*found in flints in cigarettes, glass and TV screens
Actinides
*radioactive (unstable)
*elements after 94 do not occur in nature
*found in glass, ceramics, nuclear fuel, nuclear weapons, space equipment and smoke detedctors
Halogens
*seven valence electrons
*very reactive
*violent reaction with group 1 results in salt
*never uncombined in nature
*found in toothpaste, pools, bug spray, wipe, and bleach
Noble Gases
*Full valence with 8 electrons (stable) except He
*nonreactive
*colorless
*odorless gases at room temperature
*found in balloons, bright signs, cancer treatment, and photographic flash units
Hydrogen
*one valence electron
*most abundant in the universe
*reactive, colorless and odorless gas at room temperature
*found in stars, water molecules, and considered as alternative E source