MCAT: General Chemistry Chapter 1 (KAPLAN) Questions and Answers Already Passed

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isotopes ✔✔different number of neutrons in atoms, same atomic number but have different mass number -- they exhibit similar chemical properties and are normally labeled by their mass number (car... bon 12) except in hydrogens (protium, deuterium, and tritium) mass number ✔✔sum of protons and nucleus in nucleus -- changes with each varying isotope valence electrons ✔✔farthest electrons from the nucleus and because they are so far, they feel the least amount of electrostatic pull from the nucleus and therefore can bond with others (interact with their surrounding environment) -- determine reactivity of an atom most easily removed "active" electrons dominate the chemical behavior of an atom Electron energy levels ✔✔electrons closer to the cell nucleus have lower energy levels, and farther away have higher energy levels which subatomic particle is most important for determining: charge? ✔✔electronwhich subatomic particle is most important for determining: atomic number? ✔✔proton which subatomic particle is most important for determining: isotope? ✔✔neutron how to determine number of protons ✔✔atomic number atomic weight ✔✔average mass of naturally occurring isotopes mass of one proton ✔✔one amu = 1/12 of the carbon-12 atom (difference between proton and neutron mass is very small, the difference is equal to an electron) half-life correspond with ____ therefore helps determine ____ ✔✔stability, the relative proportions of these different isotopes [Show More]

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