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M Topics (Chapters 2 - 4)

M Topics (Chapters 2 - 4) - Summary of M Topics from...

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Summary of “M” Topics from lecture for Chapters 2 - 4 M topics – Chapter 2 Definitions of atom, molecule, element, compound Mental pictures of a solid, liquid and gas Names and symbols of elements 1 – 36 (H – Kr) Naming molecular compounds Special names of NO, NH 3 , H 2 S Structural formulae: strings of O or H atoms NOT common Figure 2.18 Charge on proton is about 10 -19 Coulomb Mass of proton is about 10 -24 g In normal atom, # of protons = # of electrons # of protons is called the atomic number Definition of mass number Definition of atomic mass Mass of proton is about 1 amu (atomic mass number) Avogadro’s Number is 6.02 x 10 23 Definition of the mole and molar mass Molar mass as a conversion factor The names of Groups I (alkali metals), VII (halogens) and VIII (noble gases) Definitions of cation and anion Spacefilling model of an ionic compound Hydration of ions in aqueous solution Ionic compounds: usually a metal bonded to a nonmetal Rule for construction of an ionic compound from any cation with any anion Rules for the charges of atomic ions of the representative elements (Table 2.3)
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