CHE 131 Chapter 2.7: Chemistry: The Molecular Nature of Matter and Change Chapter 2.7: Bonding
6 Sep 2016
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When metal bonds w/ nonmetal metal loses electrons--> becomes cation (+ ion) nonmetal gains the electrons-->becomes anion (- ion) Coulomb"s law determines strength of ionic bond (+ & - particles) energy of attraction/repulsion btwn particles is directly proportional to product of charges inversely proportional to distance btwn charges. Group-a elements form ions w/ same # of electrons as an atom of nearest noble gas. Ex: na (11e-) loses one e- to get the stability of neon (10e-) When elements are near noble gases they form monatomic ion (single ion) 2 atoms get closer-->nucleus of each atom attracts e- of the other atom strongly at some optimum distance btwn nuclei, atoms form covalent bond electrons jointly attracted by both nuclei. N2, h2, o2, p2, f2, cl2, br2, i2. Mutual attraction btwn 2 positively charged nuclei & 2 negatively charged e- Polyatomic ions x>2 atoms bonded covalently and have net + or - charge.
