1. Chapter 3 review With chalkboards

2. What is this called? z X A

3. What is the difference between oxygen-16 and oxygen-18?

4. How many p, n, e does carbon-14 have?

5. If the atom is neutral what two subatomic particles must be the same?

6. What is the atomic # of an atom which contains 9 protons, 10 neutrons, and 9 electrons? Which element is it?

7. In the gold foil experiment, most of the alpha particles went through the gold. This indicated that most of the volume of the atom is what?

8. If Z represents the atomic number and A represents the mass number of an isotope, then how do if find the neutrons?

9. What is the atomic number for an element with 6 protons, 8 neutrons, and 6 electrons?

10. All isotopes of a given element must have the same

11. Who discovered electrons?

12. If the mass number of carbon changes what changes? What remains the same?

13. What is the total number of electrons in 40 Ca?

14. Write the isotope symbol for an atom that contains 22 neutrons, 18 protons, and 18 electrons…

15. Write the isotope symbol for an atom that contains 10 neutrons, 9 protons, and 10 electrons…

16. Solve for atomic mass of nitrogen if 95% of the mass 14 and 5% of the mass is 15. Write isotope symbol for each