A capital E is commonly used, e.g., Einstein's E=mc2
eg the qick brown fox jumped over the lazy fridge
The heaviest element with a one letter atomic symbol is uranium (symbol: U).
a letter or symbol that stands for one or more numbers is a
I don't think there is one but I'm not sure. I don't think you show energy on a symbol equation.
Energy does not have a symbol.
Potassium
The symbol for potential energy is U.
The symbol that is used to represent a joule is the letter "J". This is a derived unit of energy. It can also be used to represent work, and an amount of heat.
Chemical Symbol.
a variable
VARIABLE
It is a variable.
Chemical symbol