Atomic Structure - Physical Chemistry 0.0 / 5 ? ChemistryAtomic StructureASAQA Created by: phoebecarey21Created on: 25-01-20 13:33 Isotopes Atoms w/ the same number of protons but different numbers of neutrons 1 of 13 How do different Isotopes of the same Element react? They react chemically same because they have the same electron configuration 2 of 13 Realative Atomic Mass Ar average mass of 1 atom / 1/12 mass of 1 atom of cabon 12 3 of 13 realtive molecular mass Mr average mass of 1 molecule/ 1/12 mass of 1 atom of carbon 12 4 of 13 Vaccum the whole Time of Flight appartus is kept under high vaccum to prevent collision with air molecules 5 of 13 Ionisaton Sample forced through positive terminal of high voltage this produces postively charged electron lacking droplets 6 of 13 Acceleration Positive ions are attrafcted to negatively charged plate 7 of 13 Ion drift Theions pass througha hole in the negatively charged plate travelling through a tube to the detector 8 of 13 Detection When ions with the same charge arrive at the detector lighter ones have higher velocities, the flight times are noted 9 of 13 What is mass spectrometer used to identify? The different isotopes that make up an element 10 of 13 Isotope Abundance Calc Times percentage by mass / 100 = Ar 11 of 13 Ionisation Energy the energy it takes to remove electrons from an atom 12 of 13 First Ionisation Needs the least energy to remove it : EG. Na(g) -> Na+(g) + e- 13 of 13
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