Chemistry Term 1 Review Worksheet With Answers Page 8
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17Chem term # 1 review sheet
67.
What determines the order of placement of the elements on the
69. As the elements in Group 17 on the Periodic Table are
modern Periodic Table?
considered from top to bottom, what happens to the atomic
radius and the metallic character of each successive element?
A. atomic number
A. The atomic radius and the metallic character both increase.
B.
atomic mass
B.
The atomic radius increases and the metallic character
C.
the number of neutrons, only
decreases.
C.
The atomic radius decreases and the metallic character
D. the number of neutrons and protons
increases.
D. The atomic radius and the metallic character both decrease.
70. The elements in Period 5 on the Periodic Table are arranged
from left to right in order of
68. Base your answer(s) to the following question(s) on the reading
passage below and on your knowledge of chemistry.
A. decreasing atomic mass
B.
decreasing atomic number
A Glow in the Dark, and Scienti c Peril
C.
increasing atomic mass
D. increasing atomic number
The [Marie and Pierre] Curies set out to study
radioactivity in l898. Their rst accomplishment was
to show that radioactivity was a property of atoms
themselves. Scienti cally, that was the most important of
their ndings, because it helped other researchers re ne
their understanding of atomic structure.
More famous was their discovery of polonium and
71.
The data table below shows elements Xx, Yy, and Zz from the
radium. Radium was the most radioactive substance the
same group on the Periodic Table.
Curies had encountered. Its radioactivity is due to the large
size of the atom, which makes the nucleus unstable and
Element
Atomic Mass
Atomic Radius
prone to decay, usually to radon and then lead, by emitting
(atomic mass unit)
(pm)
particles and energy as it seeks a more stable con guration.
69.7
141
Marie Curie struggled to purify radium for medical
Xx
uses, including early radiation treatment for tumors. But
114.8
?
Yy
radium's bluish glow caught people's fancy, and companies
204.4
171
Zz
in the United States began mining it and selling it as a
novelty: for glow-in-the-dark light pulls, for instance, and
What is the most likely atomic radius of element Yy?
bogus cure-all patent medicines that actually killed people.
What makes radium so dangerous is that it forms
A. 103 pm
B.
127 pm
C.
166 pm
D. 185 pm
chemical bonds in the same way as calcium, and the body
can mistake it for calcium and absorb it into the bones.
Then, it can bombard cells with radiation at close range,
which may cause bone tumors or bone-marrow damage
that can give rise to anemia or leukemia.
| Denise Grady, The New York Times, October 6, 1998
Using information from the Periodic Table, explain why radium
72. The elements located in the lower left corner of the Periodic
forms chemical bonds in the same way as calcium does.
Table are classi ed as
A. metals
B.
nonmetals
C.
metalloids
D. noble gases
page 8
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