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Midterm 1

# Midterm 1 - Midterm 1(evens exam no Do not write on this...

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Midterm 1 (evens) exam no.______ Do not write on this exam 1. 25,748 in scientific notation is A. 25.748 x 10 3 B. 2.5748 x 10 4 C. 2.5748 x 10 -4 D. 25.748 x 10 -3 E. none of the above 2. Which of the following quantities is/are expressed in three significant figures? i. 8.970 x 10 2 tons ii. 0.012 mL iii. 0.005 g iv. 5.1200 ft 3 A. i and iv B. ii and iii C. iv only D. All are expressed in three significant figures E . None is expressed in three significant figures 3. The (imaginary) element naomium typically forms a -2 anion. In which group on the periodic table would you expect to find naomium? 4. Which of these ions is isoelectronic with neon? 5. Convert 12.0 liters to gallons. (1 liter = 1.056 qt, 1 gallon = 4 qt) A. 45.42 gal B. 45.5 gal C. 50.7 gal D. 2.84 gal E. 3.17 gal 6. Given 1 atm = 760 torr, what is 963.2 torr in atm? A. 0.7890 atm B. 7.32 x 10 5 atm C. 7.320 x 10 5 atm D. 1.2674 atm E. 1.267 atm

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7. (3.00 x 10 2 )(5.0 x 10 3 ) is equal to 8. How many centimeters are there in one kilometer? A. 10 5 cm B. 10 2 cm C. 10 1 cm D. 10 -2 cm E. 10 -5 cm 9. In the periodic table the halogens are in group(s) A. IA B. IIA C. VIIA D. VIIIA E. I - VIIB 10. A bond formed when two atoms share two electrons is a ______ bond; it is best described as _____. 11. An atom with Z=26 and A=58 contains how many protons, electrons, and neutrons? 12. Which of the following elements has this Lewis dot structure? A. Cl B. K C. C D. Ne E. Mn
13. The bonding in NaF 14. The electron configuration for nitrogen is: A. ls 2 2s 2 2p 6 3s 2 B. ls 2 2s 2 2p 3 C. ls 2 2s 2 3p 3 D. ls 2 2s 2 2p 6 3s 2 3p 6 3d 8 4s 2 E. 2s 2 2p 3 15. What is the ground state electron configuration of arsenic (As)? 16. Which list is in order of increasing electronegativity (lowest -----> highest) 17. Hydride is an ion of hydrogen that has a -1 charge. What is the electron configuration of hydride ion, H - ?

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18. Which of the following is the correct Lewis symbol for the given element? A. K: B. Kr: C. B: D. Be: E. O:
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Midterm 1 - Midterm 1(evens exam no Do not write on this...

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