Periodic
Games to Help You Learn The Periodic Table of Elements
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Pick the neighbour of Praseodymium
Neodymium
Lead
Ytterbium
Curium
33
117
12
73
44
23
29
47
89
61
30
43
39
45
48
57
113
26
69
88
63
100
71
46
31
98
81
11
37
9
76
32
34
25
28
85
91
64
6
109
72
110
68
86
116
51
80
38
13
59
Pr
59
Praseodymium
40
77
95
41
20
78
15
14
108
60
2
103
7
83
74
99
112
1
97
104
8
3
75
90
58
55
17
22
52
111
87
21
96
4
82
36
53
50
66
24
10
35
70
56
102
62
105
49
27
84
94
92
42
19
67
93
106
65
101
114
118
5
54
18
79
115
107
16