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The use of this metal and chemical element can be traced back to 3,500 BC. Which chemical element is number 28 in the Periodic Table?
We breathe this chemical element every day and with each breath we take. Which number in the periodic table has oxygen?
He is connected with the first circumnavigation of Earth. What is this explorer called?
Who created Mosaic, the first browser with inline images?
Who founded Microsoft in 1975 with Bill Gates?
Who had hits with the songs "Hot and Cold" and "Firework"?
Who had a hit with "If I was your Man" and "Lazy Song"?