• Write down your homework in your agenda.

• Update your table of contents

• Review the foldable on page 53• Title the left page 52, “Who do you agree

with?”

Do Now

Page #

Title Date

54 Who do you agree with? 11/12/14

55 Atomic Model HW 11/12/14

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.

• 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.

John Dalton

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

• Using only your group members, correctly sort all scientists with their correct years and discoveries.

Scientists Card Sort!

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