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The electron cloud model exPlains
why substances have color, release
heat, or give off different tYPes of
radiation. This model is not the end'
however; the atomic model will
continue to change as scientists
make new discoveries'
f; and aslc Yourself
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Modern electron cloud model
DISCUSSION QUESTION
Howdoyouthinkdesigningandusingmodelshelpedscientistsimprove
th. continued development of
their underrt"rrdirrgof i't. "L* "rrd
atomic
i
theory?
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LESSON REVIEW
ti
11
-What are the smallest building blocks of matter?
1.
iri
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AB.
C.
D.
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electrons
atoms
protons
elements
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12 neutrons' How many
A sodium atom contains 11 Protons and
of sodium have?
charged particles Jot' neutral atom
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tVhat is the MOST current model used to describe the structure of
the atom?
A.
B.
C.
D.
solar sYstem model
Bohr model
solid sPhere model
electron cloud model
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