4. Which letter represents the protons?

5. Which letter represents the neutrons?

6. Which letter represents the electrons?

7. Which letter represents the nucleus?

8. What is the name of the element represented by this model?

9. The identity of an element is determined by what?

10. What is the charge of an electron?

11. What is the charge of an electron? • negative

12. What is the charge of an proton?

13. What is the charge of an proton? • positive

14. What is the charge of an neutron?

15. What is the charge of an neutron? • Neutral • What does neutral mean?

16. The identity of an element is determined by what?

17. The number of protons. The identity of an element is determined by what?

18. What element is this?

20. What element is this? Boron

21. What element is this?

22. What element is this? Carbon

24. Calcium

26. chlorine

27. Silicon

30. Metals

32. Nonmetal

33. Metalloid

39. Valence electrons are important because they determine… • The state of matter • Chemical properties • Reactivity • Both b and c

48. Hydrogen, Lithium and Sodium are all in group #___ …

49. Hydrogen, Lithium and Sodium are all in group #_1_ …

50. Potassium, Scandium and Calcium are all in period #___