TEST REVIEW CHEMISTRY TEST
1. Compare/Contrast the 3 subatomic particles (protons, neutrons, and electrons). Please list the
location, mass, charge (+,-,0), as well as how to calculate the number of them using the periodic table.
2. What are valence electrons and where are they found? How do I calculate the number of valence
electrons using the periodic table? Why is it important to understand the number of valence electrons
in relation to bonding?
3. In radioactive decay atoms lose protons from the nucleus? If an atom loses protons how does this
affect the atom?
4. Looking at the periodic table, what do elements in the same column or family have in common? How
does this affect predictions that can be made about how the elements will react with other elements?
5. What is special about all the elements in group 8A?
6. If an atom loses electrons when bonding, what is the charge of that atom? For instance an oxygen
atoms has to gain two electrons to form a stable molecule. What would be the charge of the oxygen
atom?
7. What is the difference between Ionic, Covalent, and Metallic bonding? How do the electrons behave
in each of the different types of bonds? Which type of bond easily dissolves in water? Which type
occurs when atoms with a few valence electrons bond with an element with many valence electrons?
8. What is the difference between chemical and physical properties? Give three examples of physical
properties and three examples of chemical properties. (You need to be able to identify from a list of
words which are chemical vs. physical properties).
a. What do the following words mean and are they chemical or physical properties: (malleability,
ductility, density, luster, flammability, oxidation, rusting, corrosive, etc.)
9. Be able to correctly identify the number of molecules in a chemical formula (H2O, C6H12O6, etc.)
10. What is the difference between reactants and products? Where are each of them found in relation to
the arrow of a chemical equation?
11. What is the difference between chemical and physical changes? Where do phase changes fit in
regards to chemical or physical? In general how do the chemical properties of a compound compare
to the properties of the individual elements that it is composed of?
12. How do you know when a chemical reaction has occurred? What are some evidences of chemical
reactions? Are these evidences always reliable?
13. What causes phase changes? How are the molecules moving in relation to each other in each of the
different states of matter?
14. What is the difference between respiration and photosynthesis? There may be a bonus question on
the test asking you to write the equations for photosynthesis and respiration.
15. Draw the phase change diagram. Be able to explain what happens at each point on the diagram.
During phase changes, energy is being added, but the temperature does not go up. What is happening
to the heat that is being added during this time?
16. What factors affect chemical reaction rates? List three chemical reactions and how I can speed up the
reaction using these factors.
17. What is the law of conservation of mass? How does this law relate to balancing chemical equations? If
a student measured 3 grams of baking soda and 6.5 grams of vinegar, when measuring the mass they
find that after they have been combined and reacted there is a resulting mass of 8.9 grams. What is
the mass of the gas that escaped?
18. Which tests are used to identify minerals? Which properties do we generally use when identifying
minerals? Why is it important to use several different tests when identifying minerals?