KEATONGO KEATONGO Science Answered Carbon atom with a symbol of (1)_____ has an atomic number of (2) ____ with number of electrons equal to (3) ____. Its atomic mass is (4) _____ since its number of proton is equal to (5)_____ while its number of neutrons is (6) _____. Given the atomic structure of carbon, you can see that it has (7)_____ valence electrons