Transcript Review Ch.1(May.1)

Question(s) of the Day
• Answer the following questions
on a piece of paper and put
your name at the top. You have
8 minutes to complete the
questions of the day. Good luck!
Scan chapter 1 and answer the following
questions:
1)The diagram opposite represents
the results of one of Rutherford’s
experiments. The arrows show the possible
trajectories of alpha particles when a sheet of
gold foil is bombarded with them.
a)Why was Rutherford so surprised by the results
of his experiment?
b) Based on his discoveries, Rutherford modified
Thomson’s atomic model. What was wrong
with Thomson’s model?
Answer
a) Why was Rutherford so surprised by the
results of his experiment?
Answer: Because he did not expect any
alpha particles to bounce back off the gold
foil.
Answer
b) Based on his discoveries, Rutherford
modified Thomson’s atomic model. What
was wrong with Thomson’s model?
Answer: The deflection of some alpha particles
indicated that they had struck an object that was
both dense and positively charged—an idea that
did not fit with the image of a “positive dough” in
Thomson’s atomic model. Moreover, the fact that
most of the rays were not deflected implied that
atomic nuclei and electrons are relatively far from
one another.
Ch. 1 - part 2 – Review
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Question of Day
Web Exploration # B-5 & B-9 (FL)
Assignment Chapter 1 – part 2 Review
Go over questions
History of the Atom
Quiz next class on Assignment ch.1 part
1 and Assignment ch.1 part 2.
Draw a Lewis structure for each of the following
elements. Remember to write the names of the
elements.
I am a noble gas belonging
to the third period.
Draw the Lewis Structure for:
I am the smallest of the
atoms with four valence
electrons.
Answer: Carbon
Draw a Rutherford-Bohr
atomic model for each of
the following elements.
Remember to write the
names of the elements.
I am the first element in the
group of alkali metals.
Lithium
P= 3
E= 3
N= 7 - 4 = 3
Finish the
Assignment on
chapter 1 part 2
and get ready for
the Quiz next class.
The quiz is on
Assignment Ch.1
part 1 and part 2.