It is an algebraic variable.
In mathematical equations letters of the alphabet are used to represent numbers. Letters in the beginning of the alphabet, a, b, c...,etc typically represent Constants. Letters at the end, x, y, z..typically represent Unknowns, or variables.
X and y
variable
variable
Variable: A letter or symbol used to represent a number or quantities that vary
A variablẹ
In mathematical equations letters of the alphabet are used to represent numbers. Letters in the beginning of the alphabet, a, b, c...,etc typically represent Constants. Letters at the end, x, y, z..typically represent Unknowns, or variables.
A symbol.
It is a variable
They are the symbols for the elements . Often they are some of the letters of the English name.For example, Si means Silicon. Silver cannot be Si as well. Therefore, we use the Latin translation, Argentium, to create Ag.
element symbol
element symbol
The chemical symbol is one or two letters that represent an element.
X and y
chemical symbol
either mass or protons the top is the atomic number it shows how many protons the bottom number is the atomic mass also the weight
The symbol used to represent a nucleus is "Au", which is a combination of the atomic symbol and mass number.