Boron metal has two naturally occurring isotopes: boron-10 (19.90%; isotopic mass-10.01) and boron-11 (80.10%: isotopic mass-11.01). Calculate the atomic weight of boron Express the atomic weight to four significant figures.

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.