Argon
Carbon
Chlorine
Copper
Element
ElementChemical
ElementSimple
Fluorine
Helium
Hydrogen
Iron
Nitrogen
Oxygen
Silver
Sodium
Sulfur
Tin
Tungsten
public interface IElement
double
getMass()
java.lang.String
getSymbol()
rm()
double getMass()
double rm()
java.lang.String getSymbol()