Name Date Class ( Directed Reading for -==- Content Mastery Overview 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 electrons neutrons .---------, and have a mass number equal to the sum of .---- -'-- -"'------ ,/ 6. \ ( ) ", .. ./ are organized as elements in the and and are made up of U E vi '" C '" Cl E o (,) , 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
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Name Date Class
(
~ Directed Reading for
-==- Content Mastery
OverviewProperties of Atoms and thePeriodic Table
Directions: Complete the concept map using the terms in the list below. Terms can be used more than once,
protons periodic table electrons neutrons
.---------,
and
have a massnumber equal to
the sum of
.---- -'-- -"'-------~,/ 6. \
( )",,~- .~_/
-----._------~ ..
./
are organizedas elements in the
and
and
are made up of
UEvi
'"C'"ClEo(,)
,
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
Sedion 1 • Structure of theAtom
Sedion 2 • Masses of Atoms
Name Date Oass
. (
electron cloud
six protonsisotopes
quarks
Directions: Use the terms below to complete the following paragraphs about atoms, atomic mass, andisotopes. Terms may be used more than once.
six number electrons
neutron(s) proton(s) mass
The electron has vcry little mass compared to the 1. or
2. . 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. unit designated by amu.
8. and 9. make up the nucleus and are made up
of 10. . There are 11. uniquely
different quarks. 12. 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. "Everyc:c;;,
atom of carbon must contain 18. but some contain six neutrons and-------
others have eight neutrons.
•20 Properties of Atoms and the Periodic Table
Name Date Oass
_ Directed Reading for
-==- Content Mastery
Section 3 • The PeriodicTable
Periodic Table of the Elements
Rare-Earth Elements
a. _
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