1. $$$ Review Quiz $$$ Chapters 1 and 2

2. Does a nucleus have a positive or negative charge? Why? Positive, Because it contains protons

3. Convert 6.330 x 10 3 to standard notation 6330.

4. What is the correct formula for chromium (III) sulfate? Cr 2 (SO 4 ) 3

5. Identify the ions and their charges in AlCl 3 ? Al 3+ ; Cl -

6. What is the formula for hydrochloric acid? HCl

7. What is the correct name for Na 2 O? sodium oxide

8. What is the correct name for Cr(NO 3 ) 3 ? chromium (III) nitrate

9. Can you write down the structural formula of water?

10. Can you write down the molecular formula of water? H2OH2O

11. In a neutral gold atom, how many protons/electrons does it contain? 79 protons 79 electrons

12. In a Au 3+ atom, how many protons/electrons does it contain? 79 protons 76 electrons

13. What is the identity of ? X 201 80 Mercury

14. What is the charge on a nitride ion? -3

15. Give an example of an alkali metal, transition metal, halogen, and noble gas?

16. Is RbBr an electrolyte or non-electrolyte? Explain why you chose your answer. Electrolyte

17. Is carbon dioxide an electrolyte or non-electrolyte? Explain why you chose your answer. non-electrolyte

18. An iron gate rusts … is this a physical or chemical change? chemical

19. You are conducting an experiment at 323 K, what is the temperature in Celsius. 50 o C

20. What is a tried and true technique for separating chunks suspended in a liquid? filtration

21. What is a tried and true technique for separating liquids with different boiling points? distillation

22. Which temperature scale is the best to use when working with the gas laws? Kelvin

23. Can you describe J.J. Thompson’s experiment, what he discovered, and the model of the atom he proposed? electron beams deflected in cathode ray tube that the electron was negatively charged plum pudding model

24. Can you describe Rutherford’s experiment, what he discovered, and the model of the atom he proposed? Gold foil deflected alpha particles unexpectedly Nucleus with a positive charge Mass is in center of atom and rest of atom is mostly empty space except for electrons

25. Describe the difference between an extensive and intensive property? Extensive – depends on amount of substance Intensive – depends on physical property of a substance

26. What is the primary factor that determines whether a nucleus is stable or unstable? Neutron to proton ratio, Understand the “belt of stability”

27. Can you name Dalton’s three main postulates? 1.An element is composed of tiny particles called atoms 2.Atoms move from one substance to another, but no element disappears or is changed into an atom of another element 3.Compounds are formed when atoms of two or more elements combine In an ordinary reaction, not nuclear reactions

28. If the you could magically increase the mass of a substance without changing its volume, what would happen to its density? Increase

29. How many significant figures are in the measurement 112,000 kg? 3

30. Express the product of 1.3 mm and 5.001 mm using the correct number of significant figures? 6.5 mm 2

31. In the measurement 0.7603 kg, which digit is the estimated digit? 3

32. It is -12 o C outside, what is this expressed in kelvins? 261 K