O ATOMS, IONS AND MOLECULES Finding atomic mass from isotope mass and natural abundance A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar data on the isotopes of tin in these samples: relative (amu) abundance mass isotope 117 Sn 116.9 97.1% 114 Sn 113.9 2.9% Use these measurements to complete the entry for tin in the Periodic Table that would be used on 9. significant digits. Caution: your correct answer will have the same format but not necessarily the same numbers as th Sn

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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.