properties of atoms and the periodic table -...
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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
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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
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. _
i~II~'~i~!~IO~ ~'~i~I~:~I~I'~I~C",OUfl" ~f~ Ntoavmouir.lf''U'ro8Itlourr.ISBrMnlJm I:.~ OOiKUlJm T~ l~i~ I Erbium 1 TIdlJ1'l . Yn6f'buw i l..uteoon',04 l1:i I 14(} 90fl U424. i 14-4 ~t~ I 150.Jf I !5\.96fo 1~L"5 tS".!I2~ Hi? 5(; I 164 1t1 Hi726 !6$.93-I 173~' 17<1.%7
_~__... 9C; q, 9'1, 93 I 94 95 9f' 97. 9A ~J. 100 . 101 I 102 1O~
Y; Th i Pa U II Np I Pu Am! em Bk I Cf I Es I Fm : Md I No i Lr°
1lhonom Ip~.m UIlV'lflIl1 N«l'fUnillT1 1 P1I,.,lontum Amenoun\ (.Ul1r.Jn1 I k8rttellUm jCaldomun Ej~~\l HofrnlUtl"~N~ jL-...-232.038 j ~,Jl036 ! ~~~ 7..J7o.tS ; 244~ 24..1061 247070 124'.010, 25L(Jfk; J52.(I8.1! ?:"7tY.v..~ Z~,!?Il)l 2601~>
ActinideSenes
Lanthan,deSeries
b. _
Directions: Use the periodic table above to answer the following questions.
1. List two types of information that are given in each box of this periodic table.
2. In this table, where are the metals located? _
3. Where are the nonmetals located? _
4. "\That are the elements in Groups 3 through 12 called? _
5. \rVhat are the elements called that are next to the stairstep-shaped line on the
right side of the table? _
6. What do we caU the letter or letters that represents an element?
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'"C'"Cl.
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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? _
Properties of Atoms and the Pfliodi< Table 21
, (
ClassDate
_ Directed Reading for
- Content Mastery
Name
Key TermsProperties of Atoms and thePeriodic Table
Directions: Match the term in Column /I with the definition in Column I. Write the letter of the correct term inthe blank at the left.
Column I Column II
1. sum of the number of protons andneutrons in the nucleus
2. region around the nucleus where theelectrons are found
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 ofits isotopes
7. positively charged particles in an atom
8. table of the elements arranged accordingto repeated changes in properties
9. represents the electrons in the outerenergy level of an element
__ 10. negatively charged particles in an atom
____ 11. atoms of the same element that havedifferent numbers of neutrons
__ 12. number of protons in an atom's nucleus
__ 13. horizontal row in the periodic table
____ 14. smallest known particle that makesup protons and neutrons
__ 15. the smallest peice of matter that stillretains the properties of the element
__ 16. developed an early periodic chart
_____ 17. approximately 1.67 x IO-24g
a. nucleus
b. electrons
c. protons
d. neutrons
c. quark
f. atomic numher
g. mass number
h. isotope
i. average atomic mass
j. electron cloud
k. periodic table
I. atom
m. atomic mass unit
n. group
o. electron dot diagram
p. period
q. Dmitri Mendeleev
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22 Properties of Atoms and the Periodic Table
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