Unit 2: Dead White Guys Name_____ (also known as the History of Atomic theory) Chapter 4

Wednesday August 24 Begin Atomic theory timeline / flashcardsThursday August 25 Thomson & his experiment / Continue working on timelineFriday August 26 Rutherford’s experiment Minilab: Black Box activity

Monday August 29 Atomic number, mass & isotopes (Calculator would be helpful!) Tuesday August 30 (Work Practice problems)Wednesday August 31 Lab – Atoms & MoleculesThursday Sept 1 Timeline is due today! Nuclear reactions/practice Friday Sept 2 Element quiz Lab Report due today Isotope mini lab

Monday September 5 Labor Day Holiday Tuesday September 6 Review for test Wednesday September 7 TEST *Turn in notebook*

Essential questions/Key questions EQ Why does the scientific community accept that matter is made of atoms? KQ What are two criticisms of Dalton’s theory? Explain how the electron was discovered. Explain how the nucleus was discovered.

EQ What are the relationships between the periodic table and the subatomic particles? KQ How does the atomic number identify an atom Why are atomic masses not whole numbers? How are average atomic masses calculated?

Vocabulary: Atom, atomic number, mass number, isotope, electron, proton, neutron,alpha, beta, gamma, radioactive decay, atomic mass unit

Checklist of things to know: (aka learning targets)Know the contributions of Democritus, Lavoisier, and Dalton to atomic theory.Explain Thomson’s Cathode Ray experiment.Explain Rutherford’s gold foil experiment.Explain Bohr’s contribution to the atomic model.Know how these experiments changed the model of the atom.Be able to compare the charge, location and mass of the 3 main subatomic particles.Define atomic number and be able to give the number of particles for any element.Calculate average atomic mass for a given set of isotopes.Distinguish between nuclear and chemical reactions. Predict products for nuclear reactions.

Notebook includes: Flashcards - elements Notes taken from timeline research. (The timeline is turned in separately.) Vocabulary (all 12) Notes on Thomson demo. Black box minilab. Notes + handout on Atomic #, mass & isotopes. Isotope minilab. Notes + practice on nuclear reactions. Study guide for test.

Elements and Their Symbols

You will have a quiz on the following 48 elements and their symbols:

aluminum Al manganese Mnargon Ar mercury Hg

arsenic As neon Nebarium Ba nickel Ni

beryllium Be nitrogen Nboron B oxygen O

bromine Br phosphorus Pcadmium Cd platinum Ptcalcium Ca plutonium Pucarbon C potassium Kcesium Cs radium Ra

chlorine Cl radon Rnchromium Cr selenium Se

cobalt Co silicon Sicopper Cu silver Agfluorine F sodium Na

gold Au strontium Srhelium He sulfur S

hydrogen H tin Sniodine I titanium Tiiron Fe tungsten Wlead Pb uranium U

lithium Li xenon Xemagnesium Mg zinc Zn

Georgia Performance standard:SC3 Students will use the modern atomic theory to explain the characteristics of atoms. a, c & d

a. Discriminate between the relative size, charge, and position of protons, neutrons, and electrons in the atom.

c. Explain the relationship of the proton number to the element’s identity.

d. Explain the relationship of isotopes to the relative abundance of atoms of a particular element.

EQ: Why does the scientific community accept Atomic theory?

Find the answers to as many questions as you can in the time that you have, and then organize your answers into a timeline or foldable or children’s book. Your notes will go in your notebook but your timeline will be checked separately.

For your assigned scientist(s): Look up at the time period of his life, his country of origin and his contribution to our understanding of the atom. Also look up the questions that go with your guy.

People

1. Democritus- What famous Greek philosopher disagreed with Democritus and why?

2. Robert Boyle- What book does he write?Joseph Priestly- What famous (at the time) theory did Priestly prove wrong?

3. Both Antoine Lavoisier and Robert Proust indirectly contributed to the discovery of the atom. How?

4. John Dalton- What was his profession (not a chemist, what did he do to make money)? Explain his atomic theory. (4 main statements) 2 parts of his theory are incorrect. Describe those 2 parts.

5. J.J. Thomson- What year did he conduct his cathode ray experiment?What particle did he discover with the cathode ray experiment? Summarize his experiment (what he did &what he discovered). Describe and draw his model of the atom.

6. Ernest Rutherford- What year did he conduct his experiment?What was trying to prove with his experiment?Summarize his experiment (what he did & what he discovered).Why was he surprised by his experimental results?Did his results fit with Thomson’s view of the atom?Describe and draw his model of the atom.

7. Niels Bohr – What year did he conduct his experiment? Summarize his experiment with Hydrogen. (what he did and what he discovered) Describe and draw his model of the atom. Since electrons and protons are oppositely charged, the electrons should attract to the nucleus. How did Bohr explain that this does not occur?

Rare extra credit: 5 pts on a unit test: As all the scientist above are white males, investigate a female or a non-white figure who has contributed a significant finding to the structure of the atom. In a single paragraph, include 1) name 2) country of origin 3) ethnicity if not white