- basis of organic chemistry
- most reoccuring element in nature
- atomic mass of six
- atomic number of 12
- six protons
- atomic number: 53
- atomic mass of 126.9
- is a halogen
- nonmetal
- looks shiny and black when in its solid state
- atomic number is 22
- atomic mass is 47.9
- is a transition metal
- discovered in the 18th century
- is a dark gray metal
- atomic number of 39
- named for a village in Sweden
- atomic mass is 88.9
- is moderately reactive
- used in television tubes
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