1. Grade 10 Science – Unit 2 – Chemistry – Chemical Bonding Classifying Chemicals Ionic ChargesChemical Formula Atomic Number and Atomic Mass Rates of Reaction 11111 22222 33333 44444 55555

2. A characteristic of appearance including colour, state, texture or hardness

3. What is a Physical Property?

4. A pure substances that cannot be broken down into a simpler substance.

5. What is an Element?

6. The formation of a new compound, colour change, bubbling (i.e., gas production) and/or heat.

7. What is Chemical Change?

8. A pure substance that contains TWO or MORE different elements in a fixed proportion.

9. What is a Compound?

10. A heterogeneous combination or two or more substances OR different substances are brought together without creating a new substance.

11. What is a Mixture?

12. The Ionic Charge of Potassium (K), Francium (Fr) and Sodium (Na)

13. What is 1+?

14. The type of ion formed when an electron is gained.

15. What is a Negative Ion?

16. Element with a charge (+ or -).

17. What is an Ion?

18. The Ionic Charge of Oxygen (O), Sulfur (S) and Selenium (Se).

19. What is 2-?

20. Negative

21. What is the charge of an electron?

22. Chemical formula for Potassium fluoride.

23. What is KF?

24. .

25. What is CO 2 or Carbon dioxide?

26. The name of the gases on the far right of the Periodic Table that have a full outer valence, and as such, are stable and very unreactive.

27. What are the Noble Gases?

28. Chemical formula for Sodium oxide.

29. What is Na 2 O?

31. What is Water or H 2 O?

32. Number of protons = Number of electrons

33. What is Atomic Number?

34. It is so small, it is considered zero.

35. What is the mass of an electron?

36. Number of neutrons + Number of protons.

37. What is Atomic Mass?

38. It is the outer electron orbit.

39. What is the Valence Level?

40. It is the maximum number of electrons in Orbit #2

41. What is eight?

42. The amount of a material in a given space.

43. What is Concentration?

44. It is increased when one large piece is broken into many smaller pieces.

45. What is Surface Area?

46. It changes the rate of a reaction but it is not consumed during the reaction.

47. What is a Catalyst?

48. A chemical reaction can only occur when molecules do this.

49. What is Collide?

50. Molecules will move faster when this is increased, and molecules will move slower when this is decreased.

51. What is Temperature?