Q. The atomic number of a nucleus is 6 and the number of neutrons is 7. What is the mass number of the element? Share with your friends Share 1 Mahdi Reza Vakil answered this Mass number = Atomic number + Number of Neutrons. = 6 + 7 = 13 2 View Full Answer Shraddha Maheshwari answered this 13 0 Leoyash answered this Mass number = no of protons + no.of neutrons...so mass number will be equal to 6+7=13 -1
