K and M
It is an algebraic variable.
Actually, the number was discovered and then a symbol had to be assigned to it. Letters of the Greek alphabet are traditionally used for mathematical things, to the symbol for pi was naturally chosen from the Greek alphabet.
A symbol usually only has one or two letters in it and a formula usually has a group/combination of symbols
Mathematician Rudolph Swetchefriz{Added} The symbol is not "for" pi but is pi - one of the letters of the Greek alphabet.
The symbol for transposing letters is typically an apostrophe ('). For example, transposing the letters "dog" would be written as "d'og".
The symbol that always represents either one or two letters is the chemical symbol. Each element on the periodic table is represented by a unique chemical symbol, typically consisting of one or two letters.
The symbol is called an asterisk, which is represented by the symbol "*". By adding the letters "ast" to "aster", you get the word "asteroid".
Symbol
The symbol comprises the first two letters of the name of the element.
kcal is the symbol of kilo calories.
A symbol.
The symbol for calcium is Ca.
The chemical symbol Cm is derived from two letters of the name.
The symbol of mendelevium, Md: the first and the second letters of the name.
The symbol was taken from the first two letters of the element, Helium
The letter J.