ISBS (p.51) #19-24

6/24/13

19.
    a) carbon: 6 protons, 6 electrons
    b)  aluminum: 13 protons, 13 electrons
    c) lead: 82 protons, 82 electrons
    d) chlorine: 17 protons, 17 electrons

20.
    a) sulfer: 16 protons, 18 electrons: No
    b) iron: 26 protons, 24 electrons: No
    c) silver: 47 protons, 47 electrons: Yes
    d) iodine: 53 protons, 54 electrons: No

21.
   a) anion
   b) neutral
   c) neutral
   d) cation
   e) cation

22.
   a) gaining electrons
   b) neither
   c) neither
   d) losing electrons
   e) losing electrons

23.
   a) hydrogen with 1 proton and 1electron: H
   b) sodium with 11 protons and 10 electrons: Na+
   c) chlorine with 17 protons and 18 electrons: Cl-
   d) aluminium with 13 protons and 10 electrons: Al+

24.
   a) K+ and I-: Potassium iodine: KI
   b) Ca²⁺ and S2-: Calcium sulfide: CaS
   c) Fe3+ and Br-: Iron bromide: Fe3+(Br-)3: (Fe)(Br)3
   d) Ba2+ and OH-: Barium hydroxide: Ba2+(OH-)2: (Ba)(OH)2
   e) NH₄+ and PO₄^3-: Ammonium  phosphate: (NH₄+)3 + PO₄^3-: (NH4)3(PO4)
   f)Al3+ and O2-: aluminum oxide: (Al3)2 + (O2-)3: (Al)2(O)3