Group 2:Alkaline Earth Metals
Janae Davis~Courtney Sipes~Heaven Anthony
Element Description
Beryllium
Atomic Mass~9
Symbol~Be
Uses~springs, electrical contacts, and non-sparking tools. It is applied as a structural material for high-speed aircraft, missiles, spacecraft, and communication satellites.
Discovered by:Louis Nicolas Vauquelin
Number of Valence electrons~2
Magnesium
Atomic Mass~24
Symbol~Mg
Uses~Burning magnesium produces white light. This makes it ideal for firework sparklers, flares and flash photography. The element’s ions are necessary for every living organism. That is why magnesium salt is included in fertilizers and food.
Discovered By:Joseph Black
Number of Valence Electrons~2
Calcium
Atomic Mass~40
Symbol~Ca
Uses~Calcium metal is used as a reducing agent in preparing other metals such as thorium and uranium. Calcium compounds are widely used.
Discovered by:Humphry Davy
Number of Valence Electrons~2
Strontium
Atomic Mass~88
Symbol~Sr
Uses~A soft, silvery metal that burns in air and reacts with water. Strontium is best known for the brilliant reds its salts give to fireworks and flares.
Discovered By:William Cruickshank
Valence Electrons~2
Barium
Atomic Mass~137
Symbol~Ba
Uses~Barium is used in fireworks to give a green colouration. Barium is used in medicine in the form of a Barium Meal (i.e. Barium Sulphate, BaSO4), is used as an X-Ray contrast medium
Discovered by~Carl Wilhelm scheele.
Valence Electrons~2
Radium
Atomic Mass~227
Symbol~Ra
Uses~Radium had been used to make self-luminous paints for watches, aircraft instrument dials and other instrumentation, but has largely been replaced by cobalt-60, a less dangerous radioactive source.
Discovered By:Pierre Curie and Marie Curie
Valence Electrons~2
What the Elements have in common
Sources
http://theodoregray.com/periodictable/Samples/004.1/s12s.JPG
https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=uses+for+strontium
https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=uses+for+barium
https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=alloy+definition