Question

An element has a mass of 39.2 and an atomic number of 19. How many protons does this element have? How many neutrons? How many electrons?

Answer 1

19 protons 19 electrons 3 neutrons

Answer 2

19 protons, 19 electrons, and 3 neutrons

Step-by-step explanation:

the atomic number is 19 so the protons are the same, 19, and the electrons are the same as the proton, because protons are positive and electrons are negative so they have to balance out and the neutrons ➗ mass number by the atomic number.