Chemistry Unit Test Study Guide
Name: ____________________________________________
Atoms, Atomic Structure, Atomic Models
1. What is an atom?
2. What are the names and charges of the 3 subatomic particles? Where are they located in the atom?
3. Draw a picture of an atom of Boron and label the following parts—proton, neutron, electron, nucleus,
and electron shell.
4. How do you calculate the number of protons, neutrons and electrons in an atom? (Think about atomic
mass and atomic number)
5. How many electrons can fit in the first shell? How many can fit in the second shell?
Chemical Bonding/Classifying Matter
6. a) What is an ionic bond? What is a covalent bond?
b) What is happening to the electrons in each type of bond?
7. Why do atoms bond? (What is their goal?)
8. What is the difference between an element and a compound?
9. What is the difference between a compound and a mixture?
10. What is the difference between homogeneous and heterogeneous mixtures?
11. What is a solute? What is a solvent?
12. Acids have a pH ranging between ______ and ______ while bases have a pH ranging between ______
and ______.
The Periodic Table
13. Who first created the periodic table?
14. What is the purpose of the periodic table?
15. What is the difference between groups and periods?
16. Which group on the periodic table is not reactive? (will not bond)
17. Which group on the periodic table is the most reactive? (really wants to bond)
18. Where on the periodic table can we find metals, non-metals and metalloids?
a. What is the only non-metal on the left?
19. Be able to identify if an element is a metal, metalloid or non-metal based on their location on the
periodic table.
20. What are the properties of metals and non-metals (What do they look like? What can they do?)
21. What is malleability? What is ductility?
22. Be able to identify the following groups on the periodic table: Alkali Metals, Alkaline Earth Metals, Noble
Gases
23. How many valence electrons does…
24. Group 1 have? Group 18 have? Group 6 have?
Chemical Change vs. Physical Change
25. What is the difference between a chemical and physical change?
26. What are the 4 indicators of a chemical change?
27. What is the difference between an endothermic and exothermic reaction?
Chemical Equations
28. Be able to label the following parts of a chemical equation—reactants, products, coefficients, and
subscripts. Practice on the following equation:
a. 2 H2O  2 H2 + O2
b. Is this equation synthesis, decomposition or single replacement?
29. What is the Law of Conservation of Mass?
30. If the mass of the reactants in an equation is 158g, what is the mass of the products?
31. Name the atoms in the following compounds and tell how many atoms of each element are in each
compound:
a. H3CO2
b. Ca2SO4
c. NaOH
32. What is our goal when balancing a chemical equation? (How do we know we’re balanced?)
33. What is the difference between a catalyst and an inhibitor?
Balancing Equations Practice: One of these equations will be on your test.
_____Fe + _____O2  _____Fe2O3
_____ K + _____ Br2  _____KBr
_____ Zn + _____HCl  _____ ZnCl2 + _____H2
_____Na + _____ H2O  _____NaOH + ______H2
_____ S8 + _____ O2  _____SO3
_____N2 + _____ H2  _____NH3