1. Semester I Review

2. Semester I Review How many sig-figs are found in each number? 0.345
3005
300
3.002

3. Semester I Review Round each number to three sig-figs. 45678 0.002894
23.76
100.5
56.799

4. Semester I Review Which of the following is a mixture. Pure water
Clean air
Iron (II) oxide
Salt water
Carbon dioxide

5. Semester I Review Which of the following is a chemical change.
Cutting paper
Boiling water
Rusting iron
Burning gasoline

6. Complete the table using the given numbers
Symbol
Mass #
Atomic #
Protons
Neutrons
Electrons
X - ___ 10 15
Y - 35 14
Z - ___ 56 25

7. Semester I Review
Calculate the average atomic mass given the following data: element Y has three isotopes 35.0% = 23.5 amu, 55.0% = 25.0 amu and 10.0% = 26.0 amu.

8. Semester I Review
25.0 grams of a given metal displaces 44.2 mL of water; what is the density of the metal?

9. Semester I Review
What did each scientist contribute to the development of the modern atom.
Dalton
Thomson
Rutherford
Milliken

10. Determine if the data below is accurate, precise, both, or neither
Trial #
Measurement
True Value = 34.50 1
34.56 2
34.45 3
34.78
Calculate the percent error using the average of the measurements.

11. Semester I Review The splitting of a nucleus is known as ________.
The combining of two small nuclei to form a larger one is known as __________.
Give the formula of an alpha particle and beta particle.

12. Semester I Review Decay of polonium-218 by alpha () emission.
Decay of carbon – 14 by beta emission
Decay of Thorium by an electron capture

13. Semester I Review
The half-life of phosphorous-30 is 2.5 min. If you start with 55 g of phosphorus-30, how many grams would remain after 27.5 min?

14. Semester I Review
A radioactive isotope decayed from grams to grams in 15 years. Determine the half-life of the isotope.

15. Semester I Review
Calculate the wavelength of electromagnetic radiation with a frequency of 6.5x1016 Hz.
Calculate the energy of the above electromagnetic radiation.

16. Semester I Review
If n=4; how many sublevels, Orbitals, and Electrons are present?
T or F (p) sublevels have 7 orbitals
T or F (d) sublevels hold 6 electrons
T or F (s) sublevels hold 2 electrons

17. Semester I Review For the element Cobalt; give the:
Long hand electron configuration
Box and arrow notation
Noble gas configuration
Electron Dot Structure

18. Semester I Review Give the ion for each of the following elements:
Sodium, Oxygen, Chlorine, Barium, Gallium, Sulfur, Nitrogen, Aluminum, Silver, Zinc, Cadmium

19. Semester I Review Give the formula for the following compounds
1) iron (II) arsenide
2) lead (II) sulfate
3) lead (IV) hydroxide
4) copper (II) acetate
5) beryllium chloride
6) ammonium chromate
7) silver oxide
8) potassium sulfide

20. Semester I Review Give the name of the following compounds 1) NaBr
2) Sc(OH)3
3) V2(SO4)3
4) NH4F
5) CaCO3
6) NiPO4
7) Li2SO3
8) Zn3P2
9) Sr(C2H3O2)2
10) Cu2O