AP Chemistry Practice Test 17

1. Substances whose Lewis structures must be drawn with an unpaired electron are called

2. Potassium-40 is a minor isotope found in naturally occurring potassium. It is radioactive and can be detected on simple radiation counters. How many protons, neutrons, and electrons does potassium-40 have when it is part of K2SO4?

3. An ideal solution is a

4. Which of the following lists the electromagnetic spectral regions in order of decreasing wavelength?

5. Sodium fluoride dissolves in water and undergoes hydrolysis. What is the equilibrium expression for the hydrolysis reaction?

6. Of the following pairs of elements, which pair has the second element with the larger electronegativity based on its position in the periodic table?

7. What is an alpha particle?

8. Which of the following molecules is a strong electrolyte when dissolved in water?

9. When using the ideal gas law, standard conditions for temperature and pressure are

10. The dimerization of NO2(g) to N2O4(g) is an endothermic process. Which of the following will, according to Le Châtelier's principle, increase the amount of N2O4 in a reaction vessel?

11. Which of the following is expected to have the highest electronegativity?

12. When a solid melts, the entropy change and enthalpy changes expected are