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Hydrogen (H)
1
Lithium (Li)
1
Sodium (Na)
1
Potassium (K)
1
Rubidium (Rb)
1
Cesium (Cs)
1
Francium (Fr)
1
Beryllium (Be)
2
Magnesium (Mg)
2
Calcium (Ca)
2
Strontium (Sr)
2
Barium (Ba)
2
Radium (Ra)
2
Scandium (Sc)
3
Yttrium (Y)
3
Lanthanum (La)
3
Actinium (Ac)
3
Titanium (Ti)
4
Zirconium (Zr)
4
Hafnium
4
Chromium (Cr)
2, 3
Manganese (Mn)
2, 3
Iron (Fe)
2, 3
Cobalt (Co)
2, 3
Copper (Cu)
1, 2
Silver (Ag)
1
Gold (Au)
1, 3
Zinc (Zn)
2
Cadmium (Cd)
2
Mercury (Hg)
1, 2
Boron (B)
3
Carbon (C)
-4
Silicon (Si)
4
Tin (Sn)
2, 4
Lead (Pb)
2, 4
Nitrogen (N)
-3
Phosphorus (P)
-3
Arsenic (As)
-3
Oxygen (O)
-2
Sulfur (S)
-2
Selenium (Se)
-2
Tellurium (Te)
-2
Fluorine (F)
-1
Chlorine (Cl)
-1
Bromine (Br)
-1
Iodine (I)
-1
Astatine (At)
-1
Aluminum (Al)
3