2. CHEM 167 SI

3. 100 200 400 300 400 TermsSig FigsUnit ConIsotopes 300 200 400 200 100 500 100

4. Row 1, Col 1 Components of an atom (3 things) What are protons, neutrons, and electrons?

5. 1,2 Significant figures and scientific notation for 14,100.0 What is 6 and 1.41000x10 4 ?

6. 1,3 Which is faster, going 80 mph or 40 m/s? 40 m/s

7. 1,4 An isotope has the same number of ______ and ______ but a different number of _______. What are protons; electrons; neutrons?

8. 2,1 The type of change when iron rusts What is a chemical change?

9. 2,2 Significant figures and scientific notation for 0.0025 What are 2 and 2.5x10 -3 ?

10. 2,3 Which one of the following is the highest temperature? 38°C, 38°F, or 38 K 38°C

11. 2,4 The number of neutrons in: 33 S What is 17?

12. 3,1 How close a set of measurements are to the true value What is accuracy?

13. 3,2 1211 + 2.205 – 1.7 = (with proper sig figs) What is 1212?

14. 3,3 The temperature on a spring day is around 22°C. What is the temperature in °F and K? 72°F and 295 K

15. 3,4 The average of isotopic masses for an element. What is the average atomic mass of an element?

16. 4,1 Bonding that involves the sharing of electrons What is covalent bonding?

17. 4,2 (1.425x10 2 )(2.61x10 3 ) = (2.89x10 5 ) (with proper sig figs) What is 1.29?

18. 4,3 An unknown liquid created by NASA’s Jet Propulsion Lab was found to have a density of 69.22 lb/ft 3. What is the density of this liquid in g/mL? 2.54 cm=1 in; 2.205 lb=1 kg 1.109 g/mL

19. 4,4 The atomic weight of antimony if there are two naturally occurring isotopes, Sb-121 with an isotopic mass of 120.904 and an abundance of 57.21% and Sb-123 with an isotopic mass of 122.904 amu and an abundance of 42.79%.. What is 121.76 amu?

20. 5,1 Group of chemistry that involves carbon compounds What is organic chemistry?

21. 5,2 [(12.67 cm + 19.2 cm) x 3.99] = 1.367 s (with proper sig figs) What is 93.0 cm/s?

22. 5,3 A gold bar has the following dimensions: 2.50cm x 2.00cm x1.50 cm. Assuming that gold can be sold for $1100/oz, what is the value of the gold bar? The density of gold is 19.32 g/cm 3, and 1 lb = 453.6 g. $5,626

23. 5,4 Bromine has two naturally Occurring isotopes: Br-79 (78.918 amu) and Br-81 (80.916 amu). The atomic mass of Br is 79.904 amu. What are the fractional abundances of these isotopes? What are Br-79: 50.651% and Br-81: 49.349%?