
Period 4 elements
Period 4 is the first row where transition metals appear. It runs from potassium to krypton and includes iron, copper, zinc and nickel - the metals that power everything from kitchen knives to electric grids.
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As
Arsenic
33
74.9216
Br
Bromine
35
79.901
Ca
Calcium
20
40.0784
Co
Cobalt
27
58.9332
Cr
Chromium
24
51.9962
Cu
Copper
29
63.5463
Fe
Iron
26
55.8452
Ga
Gallium
31
69.7231
Ge
Germanium
32
72.6308
K
Potassium
19
39.0983
Kr
Krypton
36
83.7982
Mn
Manganese
25
54.938
Ni
Nickel
28
58.6934
Sc
Scandium
21
44.9559
Se
Selenium
34
78.9718
Ti
Titanium
22
47.8671
V
Vanadium
23
50.9415
Zn
Zinc
30
65.382