Page 99 - Chemistry eBook

+1 H –1
KEY
+1
K
+1
2. Are solid at room temperature (except
44.9559 +3 47.867 +2 50.9415 +2 51.996 +2
Group 2
+1 9.01218 +2
12
on C = 12 (exact)
i Be 4
Atomic Number Electron Configuration
Note: Numbers in p are mass numbers o stable or common is
54.9380 +2 55.845 +2 58.9332 +2 58.693 +4
2-2
+1 24.305 +2
Characteristics of Groups 3-12 (Transition Elements):
a Mg 12
Gr oup
2-8-2
40.08 +2
1. Form colored solutions
3 4 5 6 7 8 9 10
Ca 20
+4 +4 +6 Sc Ti +3 V +3 Cr +3
Mn+3 Fe +3 Co+3 Ni
2-8-8-2
87.62 +2
21 22
27
28
b Sr
Hg, which is liquid)
23 +524 3. Have multiple positive states: They have
25 +726 2-8-13-2 2-8-14-2
101.07
2-8-9-2 2-8-10-2 2-8-11-2 2-8-13-1 88.90d5i9ffere+n3t w9a1.y2s24of bon+4din9g2.,90b6u4t the+y3’re95.94
+3
2-8-15-2 102.906
2-8-16-2 +3 106.42
+6 Y Zr Nb +5 Mo
(98) +4 +7
Periodic Table of th
Atomic Mass
12.011 –4
Selected Oxidation
Groups 3-12 (Transition EClements) Symbol +4
Ru Rh Pd 38 39 40 41 42 43 44 45 46
Tc +6
-1 2-8-18-8-2 2-8-18-9-2 2-8-18-10-2 2-8-18-12-1 2-8-18-13-1 2-8-18-13-2 2-8-18-15-1 2-8-18-16-1
still form positive ions, because they are metals.
+1 137.33 +2 138.9055 +3 178.49 +4 180.948 +5 183.84 +6 186.207 +4 190.23 +3 192.217 +3 +7
2-8-18-18 195.08
s Ba La Hf Ta W Re+6 Os+4 Ir +4
56 57 72 73 74 75 76 77 78
Pt
8-8-1 2-8-18-18-8-2 2-8-18-18-9-2 *18-32-10-2 -18-32-11-2 -18-32-12-2 -18-32-13-2 -18-32-14-2 -18-32-15-2 -18-32-17-1 +1 (226) +2 (227) +3 (261) +4 (262) (266) (272) (277) (276) (281)
r Ra Ac Rf Db Sg Bh Hs Mt Ds
6
2-4
+2
Relative atomic mas
UNIT 3: PERIODIC TABLE OF ELEMENTS © 99