2000 BC and was found in tubes in Egyptian tombs dated from 1500BC
hope this helps
Answer:
Ar
Explanation:
does not react with anything it has a full electron shell so it does not combine and it is a noble gas
100%.....50%.....25%......12.5%......6.25%......3.125%......1.5625%
...........1............2...........3..............4.................5................6..................
After six half-lives would be found 1.5625% of readioactive species.
The answer is A. use casual, friendly conversation.
Notice q=3/2, is half of the original q = 3(<span>1/2</span>)<span>t/28.8
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