Consider an atom of carbon in which the nucleus contains 6 protons and 7 neutrons.What is its atomic number and atomic mass number?
A)atomic number = 6;atomic mass number = 13
B)atomic number = 6;atomic mass number = 7
C)atomic number = 13;atomic mass number = 6
D)atomic number = 7;atomic mass number = 13

Question

Quizplus · Accepted Answer

The atomic number of an element is equal to the number of protons in the nucleus. In this case, there are 6 protons, so the atomic number is 6. The atomic mass number is the total number of protons and neutrons in the nucleus, so it is 6 + 7 = 13. Therefore, the correct answer is A, with an atomic number of 6 and an atomic mass number of 13.

Consider an Atom of Carbon in Which the Nucleus Contains