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OpenStudy (anonymous):
how many known elements exist? (atoms easy medal question) A. more than 100 B. more than 1,000 C. 50 D. 5,00
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hero (hero):
A
OpenStudy (anonymous):
d. is 5,000 not 500
OpenStudy (anonymous):
"The current total is now around 112" http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/980326a.html
OpenStudy (muhammad_nauman_umair):
A
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