Download Chapter 3 STUDY GUIDE True/False Indicate whether the statement

Chapter 3 STUDY GUIDE
True/False
Indicate whether the statement is true or false. If false, change the identified word or phrase to make the
statement true.
____
1. Every atom of the same element has the same atomic number. _________________________
____
2. When a substance burns, matter is destroyed.
____
3. The closer an electron is to the nucleus, the lower its energy. _________________________
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4. Matter always has mass. _________________________
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5. Substances are either elements or mixtures.
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6. Thompson's experiments led to the discovery of the neutron.
____
7. For an atom to be neutral, the number of protons must equal the number of neutrons.
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8. Elements on the far right of the periodic table are classified as nonmetals.
_________________________
Multiple Choice
Identify the choice that best completes the statement or answers the question.
9. Which of the following CANNOT be classified as matter?
a. an odorless, colorless gas
c. alpha particles
b. the heat given off by a light bulb
d. an electron cloud
10. The millions of compounds that exist are made from approximately ____ elements.
a. 50
c. 115
b. 75
d. 150
11. In general, nonmetals are ____.
a. good conductors of electricity
b. malleable and ductile
c. good conductors of heat
d. gases at room temperature
12. Matter that has the same composition and properties throughout is called a(n) ____.
a. substance
c. atom
b. mixture
d. isotope
13. Water and hydrogen peroxide have different properties because ____.
a. they are made from different elements
b. one contains a greater percentage of oxygen than the other
c. one is a compound and one is a mixture
d. only water follows the law of definite proportions
14. All ____ except mercury are solids at room temperature.
a. metalloids
c. metals
b. nonmetals
d. mixtures
15. When two pure substances are combined so that each of the pure substances retains its own
properties, the result is a(n) ____.
a. compound
c. element
b. mixture
d. isotope
16. Most of the mass of an atom is found in its ____.
a. nucleus
c. atomic number
b. electron cloud
d. mass number
17. In general, metals are ____.
a. poor conductors of heat
c. poor conductors of electricity
b. brittle
d. good conductors of heat
18. When Rutherford performed his metal foil experiment, he was surprised that most of the alpha
particles ____.
a. were deflected by the foil
c. were absorbed by the foil
b. bounced back from the foil
d. passed straight through the foil
19. A certain atom has 26 protons, 26 electrons, and 30 neutrons. It mass number is ____.
a. 26
c. 52
b. 30
d. 56
20. ____ has mass and takes up space.
a. Thought
b. Light
c. Air
d. Emotion
21. How many atoms of calcium are in a unit of calcium phosphate whose formula is Ca3(PO4)2?
a. one
c. three
b. two
d. four
22. Vegetable soup is an example of a ____.
a. homogeneous mixture
b. heterogeneous mixture
c. compound
d. pure substance
23. Which of these statements about matter is NOT true?
a. During chemical changes, matter is destroyed.
b. Matter has mass and takes up space.
c. Matter can be divided into pure substances and mixtures.
d. Matter is made up of atoms.
24. When someone stirs cocoa powder into hot water or hot milk, the cocoa changes from a ____.
a. homogeneous mixture into a compound
b. homogeneous mixture into a non-uniform mixture
c. compound into a heterogeneous mixture
d. heterogeneous mixture into a homogeneous mixture
Match each symbol or formula with the correct element or compound.
a. O2
c. CO
b. CO2
d. C
____
____
____
____
25.
26.
27.
28.
carbon monoxide
carbon dioxide
carbon
oxygen
Completion
Complete each statement.
Nucleus
Metals
Heterogeneous
Neutrons
Metalloids
Substance
29. All matter is made up of particles called
Atoms
Isotopes
Homogeneous
_______.
30. If pure gold is classified as 24-karat gold, then 10-karat gold must be a ____________mixture.
31. Elements on the left side of the periodic table are classified as __________.
32. A pillowcase full of Halloween candy is a ____________________ mixture.
33. For material to be classified as a pure __________, every bit of it must have the same properties.
34. Elements that have properties halfway between those of metals and nonmetals, are classified as
____________________.
35. Rutherford's contribution to atomic models was the discovery of the ______________.
36. Chlorine-35 and chlorine-37 are examples of ____________.
37. Chlorine-35 and chlorine-37 have a different number of ______________.
Use the periodic table to complete the data in Table
Properties of Selected Elements
Symbol
Name
Atomic number
Average Atomic
Mass
Copper
As
18
I
126.90447
You will also need to know the contribution of the Atomic Model that was
made by the list of scientist below.
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Niels Bohr
James Chadwick
Ernest Rutherford
J.J. Thomson
John Dalton
Lavoisier
Democritus