Page 1283 - Chemistry--atom first

Answer Key 1273
(c)
(d)
(e)
55. Zr
57. Rb+, Se2−
59. Although both (b) and (c) are correct, (e) encompasses both and is the best answer.
61. K
63. 1s22s22p63s23p63d104s24p64d105s25p66s24f145d10
65. Co has 27 protons, 27 electrons, and 33 neutrons: 1s22s22p63s23p64s23d7.
I has 53 protons, 53 electrons, and 78 neutrons: 1s22s22p63s23p63d104s24p64d105s25p5.
67. Cl
69. O
71. Rb < Li < N < F
73. 15 (5A)
75. Mg < Ca < Rb < Cs
77. Si4+ < Al3+ < Ca2+ < K+ 79. Se, As−
81.Mg2+ < K+ < Br– < As3– 83. O, IE1
85. Ra
87. (a) metal, inner transition metal; (b) nonmetal, representative element; (c) metal, representative element; (d) nonmetal, representative element; (e) metal, transition metal; (f) metal, inner transition metal; (g) metal, transition metal; (h) nonmetal, representative element; (i) nonmetal, representative element; (j) metal, representative element
89. (a) He; (b) Be; (c) Li; (d) O
91. (a) krypton, Kr; (b) calcium, Ca; (c) fluorine, F; (d) tellurium, Te
93. (a) ;(b) ;(c) ;(d)
95. Ionic: KCl, MgCl2; Covalent: NCl3, ICl, PCl5, CCl4
97. (a) covalent; (b) ionic, Ba2+, O2−; (c) ionic, (d) ionic, Sr2+, (e) covalent; (f) ionic, Na+, O2−
99. (a) CaS; (b) (NH4)2SO4; (c) AlBr3; (d) Na2HPO4; (e) Mg3 (PO4)2