A cube of gold that is 1.00 cm on a side has a mass of 19.3 g.A single gold atom has a mass of 197.0 amu. (a) How manygold atoms are in the cube? (b) From the information given,estimate the diameter in Å of a single gold atom. (c) What assumptionsdid you make in arriving at your answer for part (b)?

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A: Given, Boron atoms are found in two forms: boron-10 and boron-11 Average mass of B = 10.81 amu

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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.