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Unit 2 Review: Answer All Questions on Loose Leaf Paper
1. Name 4 scientists that had early models of the atom. Describe their model.
2. Name the 3 parts of the atom. Describe each part.
3. Give the atomic number, atomic mass, number of protons, number of neutrons and
number of electrons for each of these 4 elements: Carbon, Magnesium, Neon,
Hydrogen
4. Give the definition and an example of these 4 terms: Isotope, Ion, Cation, Anion
5. Name 3 trends (similarities or differences) that you see as you move across a period
(row).
6. Name 3 trends (similarities or differences) that you see as you move down a group
(column).
7. Give 4 characteristics of a metal.
8. Give 4 characteristics of a nonmetal.
9. Give 2 characteristics of a metalloid.
10. Give 2 characteristics of a noble gas.
11. Name 3 metals.
12.Name 3 nonmetals.
13.Name 3 metalloids.
14.Name 3 noble gases.
15.Give 3 pieces of information about an ionic bond.
16.Give two examples of an ionic compound. Identify the positive and negative ion in each
example.
17.Give 3 pieces of information about a covalent bond.
Unit 2 Review: Answer All Questions on Loose Leaf Paper
18.Give two examples of a covalent molecule.
19.Tell how many valence electrons the following atoms would need to gain/lose in order
to fulfill the octet rule: Flourine, Sulfur, Sodium, Magnesium, Helium
20. Give three examples of molecules.
21.Name three examples of compounds.
22.Explain the law of conservation of mass.
23.Give two examples of heterogeneous mixtures. Give two examples of homogeneous
mixtures.
24.Name 5 physical properties.
25.Name 2 chemical properties.
26.Give 2 signs that a chemical reaction has occurred.
27.Give 3 examples of a physical change.
28.Give 3 examples of a chemical change.
29.Name the 4 states of matter. Give two characteristics of each.
30.Name and describe what is happening at each of these five phase changes: evaporation,
melting, sublimation, condensation, freezing.
31.Write the formula for density. Is density a chemical or physical property of matter?
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