Download Properties of Atoms and the Periodic Table

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Class
Date
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Directed Reading for
Overview
Content Mastery
Properties of Atoms and the
Periodic Table
Directions: Complete the concept map using the terms in the list below. Terms can be used more than once,
protons
periodic table
neutrons
electrons
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have a mass
number equal to
the sum of
are made up of
are organized
as elements in the
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Directions: complete the following sentences by underlining the correct words in parentheses,
7. An element is matter that is composed of one type of (atom/quark).
8. The unit of measurement used for atomic particles is the
(atom size/atomic mass unit),
9. Atoms of the same element that have different numbers of neutrons are called
(isotopes/electron clouds),
10. In the periodic table, elements are arranged by increasing atomic (power/number).
11. An electron dot diagram uses the symbol of an element and dots to represent
the (quarks/electrons) in the outer energy level.
Properties of Atoms and the Periodic Table 19
Date
Name
Oass
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Sedion 1 • Structure of the
Atom
Sedion 2 • Masses of Atoms
Directions: Use the terms below to complete the following paragraphs about atoms, atomic mass, and
isotopes. Terms may be used more than once.
electron cloud
six
number
electrons
isotopes
six protons
neutron(s)
proton(s)
mass
quarks
The electron has vcry little mass compared to the 1.
2.
or
. The mass of the atom depends on the nucleus and how
many 3.
and 4.
it has. The sum of the
protons and neutrons is the mass 5.
of an atom. The number
of neutrons in an atom can be found by subtracting the atomic number from the
6.
number. The mass of the atom is so small that there is a
measure called the atomic 7.
8.
of 10.
and 9.
unit designated by amu.
make up the nucleus and are made up
. There are 11.
different quarks. 12.
uniquely
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are found in an area around the nucleus called
the 13.
. The nuclei of all atoms of a given element always have the
same number of 14.
"They will also have the sanle number of
15.
around the nucleus. Some atoms may have more or fewer
16.
than will other atoms of the same element. Atoms of the same
element with different numbers of neutrons are called 17.
"Every
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atom of carbon must contain 18. - - - - - - - but some contain six neutrons and
others have eight neutrons.
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20 Properties of Atoms and the Periodic Table
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Directed Reading for
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Date
Section 3 • The Periodic
Table
Content Mastery
Periodic Table of the Elements
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Directions: Use the periodic table above to answer the following questions.
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3. Where are the nonmetals located?
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4. "\That are the elements in Groups 3 through 12 called?
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right side of the table?
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6. What do we caU the letter or letters that represents an element?
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7. How many elements are included in the modern periodic table?
8. What name is given to the elements in Group IS?
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Properties of Atoms and the Pfliodi< Table 21
Date
Name
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Directed Reading for
-
Content Mastery
Class
Key Terms
Properties of Atoms and the
Periodic Table
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Directions: Match the term in Column /I with the definition in Column I. Write the letter of the correct term in
the blank at the left.
Column I
Column II
1. sum of the number of protons and
neutrons in the nucleus
2. region around the nucleus where the
electrons are found
a. nucleus
b. electrons
c. protons
3. positively charged center of an atom
4. vertical coluTIln in the periodic table
5. neutral particles in the nucleus of an atom
6. weighted average mass of the mU1:ure of
its isotopes
d. neutrons
c. quark
f. atomic numher
g. mass number
7. positively charged particles in an atom
8. table of the elements arranged according
to repeated changes in properties
9. represents the electrons in the outer
energy level of an element
_ _ 10. negatively charged particles in an atom
h. isotope
i. average atomic mass
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j. electron cloud
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____ 11. atoms of the same element that have
different numbers of neutrons
I. atom
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_ _ 12. number of protons in an atom's nucleus
m. atomic mass unit
_ _ 13. horizontal row in the periodic table
n. group
____ 14. smallest known particle that makes
up protons and neutrons
o. electron dot diagram
_ _ 15. the smallest peice of matter that still
retains the properties of the element
p. period
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22 Properties of Atoms and the Periodic Table
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