Fall 2016 Exam III 1. b 9. b 16. (next slides) 2. e 10. d 17. (next slides) 3. b 11. a 4. c 12. d 5. d 13. e 6. c 14. e 7. c 15. a 8. a  

16. a) TRUE – A lot more energy is released in the form of sound when water is produced versus what had to be put in to get the reaction started. Activation energy Products Reactants

16. b) FALSE – We do not know the movement of an electron. We can only predict with 90% probability that an electron will show up in a region of space (orbital). 16. c) FALSE – The element X is identified as an element from group 6. When it forms a compound with Ca, Ca forms a 2+ charge and the element X forms a 2– charge. Therefore the formula is CaX.

16. d) TRUE – They all contain the same number of electrons (10 electrons).   Mg2+ < Na+ < F– < O2– The ion with the most protons is the smallest due to its higher nuclear charge (and thus pulls the electrons in closer). As the number of protons decrease, the size increases.

17. 17. a)

17. 17. b)

17. 17. c)

17. 17. d) 17. e)