Is a widely distributed element that forms organic compounds in combination with hydrogen,oxygen,etc.,and that occurs in a pure state as diamond and graphite,and in an impure state as charcoal.
Symbol :C;
Atomic Weight :12.011
Atomic Number:6
Hydrogen:
Is a colorless, odorless, flammable gas that combines chemically with oxygen to form water the lightest of the known elements.
Symbol: H
Atomic Weight:1.00797
Atomic Number:1
Radon:
Is a chemically inert, radioactive gaseous element produced by the decay of Radium : emissions produced by out gassing of rock, brick,etc.area health hazard.
Symbol: Rn
Atomic Number:86
Atomic Weight:222
Iodine:
Is a nonmetallic halogen element occurring at ordinary temperatures as a grayish-black crystalline solid that sublimes to a dense violet vapor when heated: used in medicine as an antiseptic.
Symbol: I
Atomic Weight :126.904
Atomic Number:53
