Group 2

Group 2 

• Barium is kept in oil to prevent it from reacting with the air
• Magnesium is an abundant metal, used in planes and cars due to being lighweight
• Beryllium is light and toxic. It's also very rare
• Calcium is a major omponent of bones, teeth, tusks and antlers
• Strontium produces crimson colour flames and so is sued in tracer bullets
• Radium is a radioactive element discovered by Marie Curie
• Acidified BaCl2 solution is used as a reagent to test for sulfate ions
• If Barium Chloride is added to a solution that contains sulphate ions a white precipitate forms
• The acid is needed to react with carbonate impurities that are ofen found in salts which would form a white Barium carbonate precipitate and so give a false result

     Atomic Radius

• The atomic radius increases as you go down the group due to more electron shells
• There's more occupied energy levels between the nucleus and the electrons in the highest occupied energy level
• This means…