Take the element "Iron" then the symbol for the element is "Fe" and "Fe" is also the symbol for a single atom of the element in a chemical equation.

A single atom of an element is represented by that element's chemical symbol.

No, carbon is a single element.

single replacement :)

A function is a rule that assigns a single value to each element in a domain.

A function is a rule that assigns a single value to each element in a domain.

A function is a rule that assigns a single value to each element in a domain.

A function is a rule that assigns a single value to each element in a domain.