digit
symbol of number= #
The name of the symbol is "pound sign" or "number sign". It is also known as an "octothorpe" or "hash symbol".
variable
A symbol name that can be displayed on a keyboard might include the pound sign or the number symbol. The dollar symbol can also be displayed on the keyboard.
formula
Potassium, with an Atomic Number of 19, is designated by the symbol 'K'.
Iron (symbol Fe, atomic number 26) is subject to corrosion.
Atomic number 53 is Iodine (I).
The symbol of an element is an abbreviation for the element's name, and it is derived either from the English or the Latin name. For example: Bromine's symbol is Br. The symbol inside an element's square is the element's atomic number, or the number of protons and neutrons in the element.
the "number symbol" ( You know 'item # 4.')
natrium - modern name sodium - symbol - Na
discriminant