The mass number of an element represents the total number of protons and neutrons in its nucleus. In this case, the element has a mass number of 10, which means it has 10 nucleons (protons + neutrons) in its nucleus.
The atomic number of an element, on the other hand, represents the number of protons in its nucleus. In this case, the element has an atomic number of 6, indicating it has 6 protons in its nucleus.
Since atoms are electrically neutral, the number of electrons in an atom is equal to the number of protons. Therefore, in this scenario, the element with a mass number of 10 and an atomic number of 6 has 6 electrons.