5.2 Homework Key
for Physical Science
Chapter 5.2
State two characteristics shared by
elements of the same group on the
Periodic Table
Chapter 5.2
Why do atoms of Group I, lose one
electron to form cations, while
atoms of group 17 gain 1 electron?
Chapter 5.2
Predict which of the following are
likely to form?
#
Y/N
Ion
Name
Group
A
Na+2
Sodium
B
Cl+
Chlorine
C
Ca+2
Calcium
D
Br-
Bromine
E
Ne-
Neon
F
Ne+
Neon
1
17
2
17
18
18
Charge
Chapter 5.2
Determine whether elements in the
following groups are likely to be
metals, nonmetals or
semiconductors (metalloids)?
#
Group
A
1
B
C
D
E
17
5
16
18
Metals
Nonmetals
Semiconductors
Chapter 5.2
Compare semiconductors with both
metals and nonmetals in terms of
their ability to conduct electricity?
Chapter 5.2
Compare semiconductors with both
metals and nonmetals in terms of
their ability to conduct electricity?
Chapter 5.2
Compare semiconductors with both
metals and nonmetals in terms of
their ability to conduct electricity?
Chapter 5.2
Where are semiconductors
(metalloids) on the periodic table?
Section Vocabulary
Word
Definition
Derivation
Ion
Gained or lost
electrons
with a charge
Faraday
1831
Greek “to Go”
Metal
Shiny element that
conducts electricity &
heat
Lavoisier 1780s
Greek “mine, ore”
Metalloid
Element with both
Metallic and
nonmetallic properties
1830
“Metal like”
Nonmetal
Poor Conductors,
good insulators
Lavoisier 1780s
“opposite of
metals”
Semiconductor
Properties in between
1875-1880 “to lead”
Chapter 5.2
Compare the number of valence
electrons in an atom of Oxygen and
Selenium?
Chapter 5.2
Compare the number of valence
electrons in an atom of Oxygen and
Selenium? In the same group?
Chapter 5.2
How does a cation differ from an
anion?
Chapter 5.2
How does a cation differ from an
anion?
Chapter 5.2
How does a cation differ from an
anion?
Chapter 5.2
How does a cation differ from an
anion?
Chapter 5.2
How does a cation differ from an
anion?
Chapter 5.2
How does a cation differ from an
anion?
Chapter 5.2
Atoms of Cs can lose electrons for
form cations. How many electrons
does a single atom lose? Explain
Chapter 5.2
Atoms of Cs can lose electrons for
form cations. How many electrons
does a single atom lose?
Chapter 5.2
Why do elements in groups share
more chemical properties than
elements in a period?
Chapter 5.2
Why do some atoms gain electrons
to form ions and some lose
electrons to form ions?
Chapter 5.2
Why do some atoms gain electrons
to form ions and some lose
electrons to form ions?
Nonmetals
Halogen
Group 17
Group 18
Metals
Group I
Alkali Metals
He
Li
F
Ne
Na
Cl
Ar
K
Br
Kr
Rb
I
Xe
Cs