one isotope of carbon has the atomic # 6+ the mass #14. An Atom of this isotope contain how many elctrons

Neutral atoms have the same number of electrons as protons.

To determine the number of electrons in an atom, you will need the atomic number of the element. In this case, the atomic number of carbon is given as 6.

Since the atomic number represents the number of protons in an atom (which is also equal to the number of electrons for a neutral atom), we can conclude that this isotope of carbon has 6 electrons.