Name
Date
Class
Lesson Outline
LESSON 1
Electrons and Energy Levels
A. The Periodic Table
1. The periodic table organizes the chemical
elements
2. Each block in the periodic table describes basic
.
properties
of one
element.
3. The periodic table lists elements in order by atomic number
.
group
4. Elements in each
have similar physical properties.
5. metal
non metals
are on the left side of the periodic table.
are on the right side of the table.
metalloids
are located in a narrow stair-step region
between the metals and the nonmetals.
B. Atoms Bond
1. Most of the matter around you is made up of
compounds
that
include two or more different elements.
2. A(n)
chemials force
is a force that holds atoms together.
protons
with a positive charge,
newtrons
with a neutral charge, and
with a negative charge.
eletrons
a.
are the atomic particles that participate in chemical
bonding.
energy level
b. The amount of energy an electron can have is a(n)
least amount
c. Electrons closest to the nucleus have the
most amount
electrons farthest from the nucleus have the
.
energy;
energy.
d. The maximum number of electrons in the first energy level, which is closest to
two
the nucleus, is
. The maximum number of electrons
eight
in the second energy level is
e. The
.
outer most
electrons in an atom are involved in chemical
bonding. These electrons are less strongly attached to
the
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nucleus
.
Elements and Chemical Bonds
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
3. Atoms contain
eletrons
Name
Date
Class
Lesson Outline continued
4. A(n)
is an outermost electron that participates in
chemical bonding.
a. The number of valence electrons in an atom tells you how many
an atom can form.
b. Each element in the same
in the periodic table has
the same number of valence electrons.
5. The
is a model that represents valence electrons in an
atom as dots around the element’s chemical symbol.
a. To create an electron dot diagram, draw one dot for each electron in the atom,
placing one dot on each of the
and then pairing additional dots.
b. The number of
sides of the symbol
dots in the electron dot diagram tells
you how many bonds an atom can form.
6. Many atoms are stable with
valence electrons. An atom
with at least one unpaired electron is
a.
.
atoms do not easily react with or form bonds with
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
other atoms.
b. Group 18 includes the
; with the exception of helium,
each of these gases have eight valence electrons and are stable.
c. Unstable atoms can become stable only by forming
with other atoms.
d. Atoms tend to gain, lose, or share valence electrons until each atom has the same
number of valence electrons as the
e. Stable atoms have
Elements and Chemical Bonds
.
pairs of valence electrons.
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