Naturally occurring element X exists in three isotopic forms: X-28 (27.977 amu, 32.21% abundance), X-29 (28.976 amu, 14.70% abundance), and X-30 (29.974 amu, 53.09% abundance). Calculate the atomic weight of X. Select one: a. 35.29 amu b. 28.92 amu c. 29.28 amu d. 25.80 amu e. 29.18 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.