Change: ppb by ppb by weight atoms Universe 400 30 Sun 500 30 Meteorite (carbonaceous) 89000 96000 Crustal rocks 540000 590000 Sea water 1300 420 Stream 100 5 Human 37000 12000I am Element! I AM FLUORINE My Compounds(My Friends!)Oxygen and Hyderogen are the   View changes from previous version. (Word count: 329)

Change: My atomic Mass is nine and my atomic weight is 18.9984032 i have 17 known isotopes, but only one of them has a stable half life. It has an atomic mass of nineteen. These isotopes have half lives ranging from 109.77 minutes to less than 40 nanoseconds. . I   View changes from previous version. (Word count: 255)

Change: my electron configuration is [He].2s2.2p5 My Properties Melting Point: 53.53 K (-219.62°C or -363.32°F) Boiling Point: 85.03 K (-188.12°C or -306.62°F) Density: 0.001696 grams per cubic centimeter Room TemperatureState: Gas Classification: Non-metal Period Number: 2 Group Number: 17 Group Name:Halogen Color:   View changes from previous version. (Word count: 234)

Change: There were only format changes (bold, italics, etc.) in this version. See this version for details. (Word count: 127)

Change:  life. life. It has an atomic mass of nineteen. All my other isotopes decay within a few seconds or nanoseconds!I have nine electrons My Properties Melting Point: 53.53 K (-219.62°C or -363.32°F) Boiling Point: 85.03 K (-188.12°C or -306.62°F) Density: 0.001696 grams per cubic centimeter Room TemperatureState: Gas   View changes from previous version. (Word count: 127)

Change:  or -363.32°F) Boiling Point: 85.03 K (-188.12°C or -306.62°F) Density: 0.001696 grams per cubic centimeter Phase at Room Temperature: Gas Element Classification: Non-metal Period Number: 2 Group Number: 17 Group Name: Halogen My Home(Body, Planet, Universe)I am Element!My Compounds(My Friends!)My StoryMy Jobs   View changes from previous version. (Word count: 71)