CH is the formula of the methylidyne.
The chemical symbol for indium is In
The chemical symbol of curium is Cm.
The chemical symbol for iron is Fe and the chemical symbol for nickel is Ni.
Beryllium's chemical symbol is Be.
The chemical symbol is an abbreviation of the chemical name for a chemical element.
There is no element with the symbol Hc. I have checked several periodic tables and find nothing I could imagine being identified this way.
HC
The chemical symbol for indium is In
The chemical symbol of curium is Cm.
The molybdenum chemical symbol is Mo.
Ce is the chemical symbol for cerium
The chemical symbol for iron is Fe and the chemical symbol for nickel is Ni.
Be is the chemical symbol for Beryllium.
Nobelium's chemical symbol is "No"
the chemical symbol is Br :)
The chemical symbol is ClO3
The chemical symbol for Helium is He