The average atomic mass of lithium is 6.941 amu. Lithium has two naturally occurring isotopes, 6Li (7.52%) and 7Li (92.48%). The mass of 6Li is 6.0151 amu. What is the isotopic mass of 7Li ?

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Q: The element lithium has an atomic weight of 6.941 amu. There are only two isotopes of lithium, Li…

A: Atomic weight of element Li = 6.941 amu Mass of 6Li = 6.0151223 amu Mass of 7Li = 7.0160040 amu

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Q: The element lithium has an atomic weight of 6.941 amu. There are only two isotopes of lithium, Li…

A: Average atomic mass = 6.941amu  6Li has mass of 6.0151223 amu 7Li has a mass of 7.0160040 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.