Without radioactive elements
2007-06-22 21:59:58 · 9 answers · asked by Milos V 2 in Science & Mathematics ➔ Chemistry
Uranium(a naturally occurring element which is radioactive),its universal abundance is 9.31*10^-3 atoms/10^6 atoms of silicon.
if u dont consider lanthanide's and actinides
Tantalum,its Universal abundance is 0.02 atoms/10^6 atoms of Silicon.
2007-06-22 22:24:01 · answer #1 · answered by Anonymous · 0⤊ 1⤋
Carbon is actually reallly bizzare. If it is arranged in one structure you get a really hard valuble crystal (diamond), If you arrange it in another way you get relatively worthless pencil lead. If you bind it to a nitrogen and a hydrogen (both of which are necesarry for life) you get a deadly poison (hydrogen cyanide) and yet you can't live without it. Just read up on carbon some more, it actually has a whole lot of interesting properties I didn't mention
2016-05-18 01:25:31 · answer #2 · answered by Anonymous · 0⤊ 0⤋
one of the rare Earth elements.
2007-06-30 15:45:36 · answer #3 · answered by vera h 3 · 0⤊ 0⤋
Oxygen
2007-06-22 22:07:04 · answer #4 · answered by Anonymous · 0⤊ 2⤋
Uranium.
2007-06-22 22:58:47 · answer #5 · answered by Kuan T 2 · 0⤊ 0⤋
It depends on earth, in the universe, in water?
look at my link
2007-06-22 22:44:56 · answer #6 · answered by maussy 7 · 0⤊ 0⤋
Anything artificially created (heavy 100's) that only exsist for seconds....
2007-06-22 22:53:41 · answer #7 · answered by ★Greed★ 7 · 0⤊ 0⤋
helium
2007-06-30 02:58:08 · answer #8 · answered by Anonymous · 0⤊ 0⤋
dysprosium
2007-06-23 16:07:42 · answer #9 · answered by Dr. Eddie 6 · 0⤊ 0⤋