 Okay, so imagine this to be a neutral atom. What would be the atomic mass of this atom? Ewing 4 is going to have an atomic mass of 4 and 4. The number of protons in this would be what? So it would be 2. And how did you figure that out? You looked at the periodic table. You looked at the atomic. The number of neutrons in this particular atom is going to be what? 2 as well. Because this number and this number have to add up to equal this number. And the number of electrons, since this is a neutral atom, is also 2. Let's do the other one since we're here. So this one says that the number of protons is 7. Number of neutrons is 8. So nitrogen. And is there a number up here? 15. It's nitrogen 15. How do we figure that out? Because this plus this, remember, is going to be the mass number here. Okay, so the atomic mass of this is 15am. And the number of electrons since this is a neutral atom is going to be everybody okay with that?