Test Bank for 21st Century Chemistry 2nd Edition Waldron All Chapters Included and Verified
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21st Century Chemistry 2nd Edition Waldron
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21st Century Chemistry 2nd Edition Waldron
Chapter 2
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1. Who was the first person to have a part of his/her body X-rayed?
a. Marie Curie
b. Anna Röntgen
c. Dmitri Mendeleev
d. Bertha Wilhelm
ANSWER: b
2. Which is defined as the emission of energy?
a. beta particles
b. radiat...
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Name: Class: Date:
Chapter 2
1. Who was the first person to have a part of his/her body X-rayed?
a. Marie Curie
b. Anna Röntgen
c. Dmitri Mendeleev
d. Bertha Wilhelm
ANSWER: b
2. Which is defined as the emission of energy?
a. beta particles
b. radiation
c. electron smear
d. X-rays
ANSWER: b
3. Which of the following can break down atoms?
a. chemical reactions
b. radiation
c. nuclear means
d. exposure to X-rays
ANSWER: c
4. ________ matter is attracted to or repelled by other matter.
a. Heavy
b. Microscopic
c. Isotopic
d. Charged
ANSWER: d
5. If the diameter of an atom is likened to the distance between San Francisco and Washington, D.C., the size of
the nucleus of this atom would be equivalent to
a. the state of Rhode Island.
b. the city of Denver.
c. a store in Kansas.
d. a hair on the head of a person in Illinois.
ANSWER: c
6. A negatively charged particle located in the cloud like smear of negative charge of an atom is called a(n)
a. proton.
b. nucleus.
c. electron.
d. neutron.
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ANSWER: c
7. Which element is the only element to contain only one proton?
a. helium
b. carbon
c. neon
d. hydrogen
ANSWER: d
8. Which statement is false?
a. The nucleus contains the protons and neutrons.
b. The number of neutrons in an element is found by subtracting the number of protons from the atomic
mass listed under each symbol on the periodic table.
c. The number of electrons in a neutral atom will be equal to the number of protons.
d. The neutron is located in the nucleus and takes up very little space inside the nucleus. Neutrons and
protons have about the same mass.
ANSWER: b
9. Although the nucleus takes up a very small portion of the volume of an atom, each particle in the nucleus is
about _________ times more massive than an electron.
a. 10
b. 100
c. 2000
d. 5 million
ANSWER: c
10. A neutral atom containing 8 protons will contain how many electrons?
a. 2
b. 4
c. 8
d. 16
ANSWER: c
11. An element is defined by the number of ________ it contains.
a. electrons
b. protons
c. neutrons
d. nuclei
ANSWER: b
12. The atomic number of an element is equal to the number of ________ that element contains.
a. electrons
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Chapter 2
b. protons
c. neutrons
d. isotopes
ANSWER: b
13. A neutral atom of sulfur will contain how many electrons?
a. 32
b. 6
c. 15
d. 16
ANSWER: d
14. How many electrons does a neutral atom of phosphorus contain?
a. 3
b. 30
c. 31
d. 15
ANSWER: d
15. At the time your textbook was written, there were _____________ known different elements.
a. 58
b. 114
c. 2125
d. 6.02 × 1023
ANSWER: b
16. Organize these elements from least number of protons to most: chromium, magnesium, arsenic, oxygen.
a. oxygen, magnesium, chromium, arsenic
b. magnesium, chromium, arsenic, oxygen
c. oxygen, arsenic, chromium, magnesium
d. arsenic, chromium, oxygen, magnesium
ANSWER: a
17. The element that has 76 protons in its nucleus is called
a. arsenic.
b. osmium.
c. thallium.
d. hafnium.
ANSWER: b
18. The scientist credited with bringing the metric system to Russia was
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