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What are the 3 MOST common elements on Earth???
# 1 OXYGEN!!!!
O = 46.6%Used by humans for breathing. All living things need it!
# 2 Silicon
Si = 27.7 %Used in electronic devices and alloys
Al = 8.1 %Used in kitchen equipment, electrical equpiment and transportation (cars, buses, trains, etc)
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ooo periodic table,chemistry