Elements whose symbol is first and third letter of its name
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Arsenic
As
Astatine
At
Chlorine
Cl
Chromium
Cr
Cesium
Cs
Magnesium
Mg
Manganese
Mn
Plutonium
Pu
Rubidium
Rb
Zinc
Zn
Strontium
Sr
Arsenic
As
Astatine
At
Chlorine
Cl
Chromium
Cr
Cesium
Cs
Magnesium
Mg
Manganese
Mn
Plutonium
Pu
Rubidium
Rb
Zinc
Zn
Strontium
Sr