a sample of a pure element that has a mass of 1.00 g contains 4.39×10^21 atom. what is the element. ..

a sample of a pure element that has a mass of 1.00 g contains 4.39×10

1.	a sample of a pure element that has a mass of 1.00 g contains 4.39×10^21 atom. what is the element. ..
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