1. 2 pt 3 pt 4 pt 5pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2pt 3 pt 4pt 5 pt 1pt 2pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4pt 5 pt 1pt Element, Compound Mixture Models & Formulas Bonding Periodic Table Equations

2. Two or more substances in the same place but not chemically combined are called this.

3. mixture 1 pt

4. The Earth’s atmosphere is composed of a bunch of different gasses and is an example of this.

5. mixture 2 pt

6. H 2 O is the formula for water and is an example of this.

7. compound 3 pt

8. Chemical formulas are used to represent this.

9. compound 4 pt

10. Pure substances are considered pure because they are made from only one type of …….

11. Particle (atom or molecule) 5 pt

12. The number of sulfur atoms in the formula H 2 SO 4.

13. 1 1 pt

14. A molecule of silver bromate is composed of 3 oxygen atoms (O), 1 bromine atom (Br), and 1 silver atom (Ag). This is the chemical formula for silver bromate.

15. AgBrO 3 2 pt

16. Which model below shows a compound? A B C

17. A 3 pt

18. Why does model C below show an element? A B C

19. It’s made from only 1 type of atom. 4 pt

20. How many different molecules are present in A below? A B C

21. 1 5 pt

22. Which of the following compounds is ionic? LiF or C 2 H 4

23. LiF 1 pt

24. This type of bond occurs when electrons are shared between atoms.

25. covalent 2 pt

26. When atoms gain or lose electrons and become charged particles, they are called this.

27. ion 3 pt

28. The joining of atoms to form new bonds is a result of this.

29. Chemical bonding 4 pt

30. When new substances form as a result of chemical bonding, most of their properties do this.

31. change 5 pt

32. Elements in the same group on the periodic table of elements have the same number of these.

33. Valence electrons 1 pt

34. Noble gasses don’t form bonds because of this.

35. They have full outer shells or 8 valence electrons and are stable. 2 pt

36. The number of valence electrons for an element can be found by using this on the periodic table of elements.

37. The group number. 3 pt

38. Why do elements in group 1 react so easily?

39. They only have 1 valence electron. 4 pt

40. Group 16 elements bond easily with this group.

41. Group 2 5 pt

42. Is the following equation balanced? SnO + 2 H 2 → Sn + 2 H 2 O

43. No 1 pt

44. What is/are the coefficient/s in the following equation. 2 C 4 H 10 + 13 O 2 → 8 CO 2(g) + 10 H 2 O

45. 2, 13, 8, 10 2 pt

46. What is/are the reactant/s in the following equation? NaCl + AgNO 3 → NaNO 3 + AgCl

47. NaCl + AgNO 3 3 pt

48. What is/are the product/s in the following equation? 2Mg + O 2 → 2MgO

49. 2MgO 4 pt

50. The Law of Conservation of Matter is reflected in balanced equations as the law states this.

51. Matter cannot be created or destroyed. 5 pt