Download Study Guide Chapters 4

Atoms and Isotopes - Study Guide
Quest on Tuesday!
Study Sources: notes, guided notes, worksheets, HW, video clips and web sites
Define the following terms:
atom
proton
atomic number
isotope
Dalton
Democritus
electron cloud
subatomic particle
nucleus
neutron
mass number
nucleon
Thomson
Bohr
cathode ray
average atomic mass
orbital
electron
atomic mass
atomic mass unit (amu)
Rutherford
scanning tunneling microscope
simple atomic model
Chadwick
calculator ~ calculator ~ calculator ~ calculator ~ calculator ~ calculator ~ calculator ~ calculator ~ calculator ~ calculator ~ calculator
Reply to these questions related to the main ideas of the unit:
 Describe Democritus’ ideas about atoms
 Explain Dalton’s theory
 Identify special instruments used to view atoms
 Describe and sketch three types of subatomic particles and their locations in the atom
 Describe the structure of atoms according to Rutherford’s atomic model
 Identify inadequacies in Rutherford’s models
 Explain Thomson’s experiment which led to the discovery of electrons
 Recognize the new proposal in the Bohr model of the atom
 Calculate the number of subatomic particles in a neutral atom
 Calculate the mass number and average atomic mass
 Explain what makes elements and isotopes different from each other and the same
 Construct and understand chemical (shorthand) notation for isotopes of elements
Solve:
1. For the element barium (Ba), give the atomic #, mass #, #protons, #neutrons, #electrons, and the
average atomic mass
2. Calculate the average atomic mass of chlorine with two isotopes. Cl-35 has a mass of 34.969 amu
with an abundance of 75.53%, while Cl-37 has a mass of 36.966 amu at 24.47%
3. Sketch a simple atomic model of the oxygen atom. Include all subatomic particles. Label the parts.
4. Which subatomic particle was discovered by Rutherford?
5. Of these isotopes of silicon, which one is most abundant? Explain why. Si-28, Si-29, Si-30
6. Write the element aluminum in chemical notation
Complete/review all HW and worksheets to support your preparation.
Revisit the websites we explored (Brainpop – Isotopes), or check out some new ones….
Youtube: How to Calculate Atomic Mass Practice Problems
https://www.youtube.com/watch?v=ULRsJYhQmlo
Youtube tutorial/lesson: What is an isotope?
http://www.youtube.com/watch?v=6w7raarHNA8&NR=1