1. NH 4

2. Ammonium +1 NH 4

3. PO 4

4. Phosphate -3 PO 4

5. NO 3

6. Nitrate -1

7. OH

8. OH Hydroxide -1

9. SO 4

10. Sulfate -2 SO 4

11. CO 3

12. Carbonate -2 CO 3

13. The atomic number tells you… The number of protons and electrons

14. An alpha particle has a mass of _____ 4 (2 protons and 2 neutrons)

15. Show the alpha decay of Radon

16. Show the beta decay of Lithium

17. Write the isotope symbol for Oxygen 16

18. Which element is this?

19. Silicon

20. How many valence electrons are in Al? Write the Lewis Dot Model

21. Which 2 elements have 10 neutrons? F and Ne F atomic number 9 Mass 19 Ne atomic number 10 Mass 20

22. Which radioactive particle does NOT change the identify of the element that emits it? Gamma Radiation (Gamma Ray)

23. Which radioactive particle changes a neutron into a proton? Beta Particle This causes the atomic number to go up by one. The mass is NOT changed because protons and neutrons have the same mass.

24. Estimate the average atomic mass of an element where 75% has a mass of 20 and 25% Has a mass of 22. 20.020.521.021.522.0