Transcript Scientists and the atom - Readington Township Public Schools

Do Now
• Write down your homework in your agenda.
• Update your table of contents
Page # Title
Date
54
Who do you agree with?
11/12/14
55
Atomic Model HW
11/12/14
• Review the foldable on page 53
• Title the left page 52, “Who do you agree with?”
Entrance: What do you think the model of the
atom is like?
•Jane: I think there would be a tiny, dense center surrounded by a
lot of empty space where some particles are whizzing around it.
•Hal: I think there would be a large center made up of mostly
empty space with particles whizzing around it. It would be
surrounded by a dense shell.
•Katie: I think there would be all empty space with many tiny
particles whizzing around through all that space.
•Jeb: I think it would look like a tiny, dense sphere with tiny
particles tightly packed inside it.
•Dara: I think it would look like a lot of tiny spheres, all touching
with no space in between them.
John Dalton
• Atoms cannot be created,
divided, or destroyed.
• Atoms cannot be converted
from one element to another
element.
• Atoms of one element are
identical to each other but
different from atoms of
another element.
J.J. Thomson
J.J. Thomson
• Discovered the electron (negatively charged)
• Proposed the chocolate chip cookie model/ plum
pudding model
Rutherford
Rutherford
Rutherford and Chadwick
• Rutherford discovered that the nucleus,
located in the center of the atom, contained
the positive charge (protons).
• Chadwick discovered that the nucleus also
contained neutrons, which have no charge.
Today’s atomic model
• Instead of orbits, electrons form an electron
cloud surrounding the nucleus.
• The nucleus has protons and neutrons
• It is impossible to know where an electron is
or how fast it is moving. We can only know
the likelihood of finding an electron in a given
location.
Today’s atomic model
Scientists Card Sort!
• Using only your group members, correctly sort all
scientists with their correct years and discoveries.
Where are the Women?
• The reasons you don’t see women scientists much in
textbooks.
– Unequal education
– Sexist culture
– Suppression of female scientists.
•Extra Credit Assignment: Research a female scientist.
–Write a paper or create a presentation
–The depth and detail you go into will determine it’s point value.
–Extra points if you teach me about someone I didn’t know about.
• Rosalind Franklin, Rachel Carson, Annie Jump Cannon
• Roger Arliner Young, Florence Barbara Seibert
• Ruby Hirose, Chien-Shiung Wu