Which two elements have similar properties and 5 electrons in their outermost shells?
1
2
1
1A
4
H
1.008
3
4
Li Be
6.94
9.012
12
11
3 Na Mg
22.99 24.31
2
2A
6
10
Ne
16.00 19.00
16 17
20.18
18
13
14
15
Al Si P
CI Ar
26.98 28.09 30.97 32.06 35.45
31
35
32 33 34
39.95
23
24
25
27
26
28
29
36
30
V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
50.94 52.00 54.94
74.92 78.97 79.90 83.80
51
54
53
52
69.72 72.63
55.85 58.93 58.69 63.55 65.38
46 47
45
41
42 43
44
48
49
50
IXe
92.91 95.95 (98)
85.47 87.62 88.91 91.22
57-71 72
56
Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te
101.07 102.91 106.42 107.87 112.41 114.82 118.71 121.76 127.60 126.90 131.29
Po At Rn
75
74
73
86
78
80
83
79
81
84
76
82
85
77
55
W Re Os Ir
Pt Au Hg Tl Pb Bi
Cs Ba La-Lu Hf
Ta
132.91 137.33 * 178.49 180.95 183.84 186.21 190.23 192.22 195.08 196.97 200.59 204.38 207.2 208.98 (209) (210) (222)
109
105 106
113
115
107
108
112
110
111
118
114
116
88 89-103 104
117
87
7
Fr Ra Ac-Lr Rf Db Sg Bh Hs
(267) (268) (269) (270) (277)
Mt Ds Rg Cn Nh Fl Mc Lv Ts Og
(278) (281) (282) (285) (286) (289) (289) (293) (294) (294)
(223) (226) +
20
21
22
Ca Sc Ti
47.87
40
5 Rb Sr
19
K
39.10 40.08 44.96
38
37
39
4
3
3B 4B
Cu and Au
Ne and Kr
.N and Sb
Nb and Ta
The Periodic Table
5
5B
6
6B
7
7B
8
9
88-
10 11
1B
13
3A
12
2B
14 15 16 17
4A 5A 6A
7A
9
6
5
7
8
B
N O
10.81 12.01 14.01
18
BA
2
He
4.003
