1. Matter &
Measurement
Atoms,
Isotopes
Nuclear Chem
Electron
Arrangement
Periodicity
Nomenclature
& Formulas
100
100
100
100
100
200
200
200
200
200
300
300
300
300
300
400
400
400
400
400
500
500
500
500
500

2. What is the number of significant figures in the following number

3. Significant figures 0.014 00 = 4 Leading Zero are losers Trailing Zero’s count decimal present

4. Round to TWO decimal?
1.45 x 10-3

5. Round to TWO decimal? 1.45 x 10-3 ANSWER: 1.44 x 10-3

6. ( precise, significant, reliable, accurate)
A measurement
that closely agrees
with accepted values
is said to be….
( precise, significant, reliable, accurate)

7. A measurement that closely agrees with accepted values is said to be… ACCURATE

8. Write the answers with the appropriate number of significant figures 46 x 10 = 460 The answer should be______?

9. Write the answers with the appropriate number of significant figures 46 x 10 = 460 The answer should be 500

10. Rounded to “1” significant figure is____________
12,700.00
Rounded to “1” significant figure is____________

11. 12,700.00 Rounded to “1” significant figure is… 10 000

12. C – 14 Protons: _______ Neutrons: ______ Electrons: ______

13. C – 14 Protons: 6 p+ (atomic #) Neutrons: 14 – 6p+ = 8n0 Electrons: 6 e-

14. Zr +4
Protons: ________
Electrons: ______ 91 40

15. Zr +4 Protons: 40 Electrons: 3691
Zr +4 Protons: Electrons: 36 40

16. How many moles are present in 107 g of sodium?

17. 107 g Na 1 mole =
23.00 g Na
4.65 moles Na

18. 6Li + 56Ni  _______

19. 6Li + 56Ni  62 Ga 3 28 31

20. The half-life of tritium is 12. 3 years. Suppose 48
The half-life of tritium is 12.3 years. Suppose 48.0mg of tritium is released during an accident. What mass of this nuclide will remain after 36.9 years?

21. The half-life of tritium is 12. 3 years. Suppose 48
The half-life of tritium is 12.3 years. Suppose 48.0mg of tritium is released during an accident. What mass of this nuclide will remain after 36.9 years? t = 12.3 yrs T = 36.9 yrs n = T/t = 36.9 yrs/12.3 yrs = mg → 24mg → 12 mg → 6 mg

22. What is an octet? What group of elements contain an octet?

23. OCTET = 8 valence electrons Noble gases have an octet of electron

24. What element am I? “contains four electrons in its third and outer main energy level”

25. What element am I? “contains four electrons in its third and outer main energy level” 3s23p2 = Silicon

26. What element am I? “contains one set of paired and three unpaired electrons in its fourth & outer main energy level ”

27. What element am I? “contains one set of paired & three unpaired electrons in its fourth & outer main energy level” s2 4p3 = Arsenic

28. What are the FOUR quantum numbers for “Yittrium”?

29. What are the quantum numbers for “Yittrium”
What are the quantum numbers for “Yittrium”? Location: 4d , 2, -2, +1/2

30. What element am I? , 3, 0, -1/2

31. What element am I? 5, 3, 0, -1/2 5f11 = Es or Einsteinium

32. What is periodicity? What TWO concepts is Periodicity is based upon?

33. Periodicity is repeating patterns (physical & chemical properties of an element is a periodic function of their atomic numbers) Periodicity is based upon 1) Effective Nuclear Charge- amount of charge 2) Shielding- distance from the nucleus.

34. List the following atoms in order of decreasing 1st ionization energy: Cl, K, Cu

35. List the following atoms in order of decreasing 1st ionization energy: Cl > Cu > K

36. Which atom or ion has the larger radius. S 2– or O 2–

37. Which atom or ion has the larger radius
Which atom or ion has the larger radius. S 2– or O 2– S 2– because S2- has increased shielding

38. Identify the smaller ion K 1+ or Ca 2+

39. Identify the smaller ion K 1+ or Ca 2+ Ca 2+

40. Which of these elements has the highest 1st ionization energy: Sn, As, or S?

41. Which of these elements has the highest 1st ionization energy: Sn, As, or S? Sulfur

42. How many atoms in total are present in one molecule of C7H5(NO2)3

43. How many atoms in total are present in one molecule of C7H5(NO2)3 C = 7 H = 5 N = 3 O = 6 TOTAL = 21 atoms

44. Nomenclature:
Ti(SO4)2

45. Nomenclature: Ti(SO4)2 Titanium (IV) Sulfate

46. Nomenclature: P2O5

47. Nomenclature: P2O5 Diphosphorus Pentoxide

48. Formula? manganese (II) phosphate

49. Formula? manganese (II) phosphate Mn3(PO4)2

50. Formula? carbon tetrachloride

51. Formula? carbon tetrachloride CCl4