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CEM 141 FINAL EXAM 2024 QUESTIONS WITH CORRECT ANSWERS!!
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CEM 141 FINAL EXAM 2024 QUESTIONS WITH CORRECT ANSWERS!!
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CEM 141 FINALEXAM 2024
QUESTIONS
WITH CORRECT
ANSWERS!!
Evatee 8/13/24 CEM 141
, CEM 141 FINAL EXAM 2024 QUESTIONS
WITH CORRECT ANSWERS!!
Why are alpha particles deflected by the nucleus?Answer - Because both the
alpha particles and the nucleus are positively charged and so the alpha particle
is repelled.
Is this statement (Dalton's Theory) true or false and why?
"All atoms of an element are identical and have the same mass and
properties."Answer - False.
Atoms of the same element can have different numbers of neutrons.
What is the evidence that electrons are subatomic particles?Answer - The
nature of the electron is independent of the material from which it emerges.
Example of a theory (explains)Answer - The properties of matter can be
EXPLAINED by understanding that matter is composed of atoms that interact
and move in various predictable ways.
Why is the boiling point of iodine higher than that of bromine?Answer -
Because iodine has a larger more polarizable electron cloud. The electrostatic
attraction between the iodine molecules requires more energy to overcome.
When bromine melts, what is happening?Answer - Attractive forces between
molecules are overcome.
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