Honors Chemistry
Matter Test Review
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What is an extensive property? Give examples. it is dependent on the amount of
matter; length, mass, volume
What is an intensive property? Give examples. it is independent of the amount of
matter; density, melting point, freezing point
What is the difference between a physical and chemical property? Give examples.
physical property is observed without changing the identity of the substance
(color)
chemical property is observed by changing the identity of the substance
(flammability)
What is the difference between a physical and a chemical change? Give examples.
physical change will change the substances appearance but not its identity
(wadding paper)
chemical change is process that involves changing substances into new
substances (burning paper)
What is the law of conservation of mass? mass of reactants = mass of products
What is a substance? mass that has a uniform and unchanging composition
What is the law of definite proportions? a compound is always composed of the
same elements in the same proportion by mass
Describe a box on the periodic table.
a- element name
b- atomic number
c- symbol
d- atomic mass
number
9. Review you “History of the Atom” Games/Puzzle.
10. What is an atom made of? protons, neutrons, electrons
11. What are the locations and charges of the three subatomic particles? proton- positive
in nucleus; neutrons- neutral in nucleus; electron- negative in electron cloud
12. What is an isotope? How do isotopes differ? isotope is a different form of an
element; they differ in their atomic mass (isotopes have different numbers of
neutrons)
13. Complete the chart below.
Atom
Sodium
Chlorine
Protons
11
17
Atoms
Neutrons
12
18
Electrons
11
17
Mass Number
23
35
14. How many electrons would be in a cation of Calcium (Ca+2)? 18 e-
15. How many electrons would be in an anion of Bromine (Br-1)? 36 e16. Review your “Parts of the Atom” quiz.
17. What is the difference between an homogeneous mixture and a heterogeneous
mixture? homogenous has the same composition throughout (solution); a
heterogenous mixture has differences in its composition
18. What is the average atomic mass of an element that has the following isotopes:
82% I-131
18% I-132
.82 X 131= 107.42
.18 X 132= 23.76
+_____
131.18 amu