Mr. Z's Chemistry Unit:  Daily Internet Homework                                     
 

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Reading Assignment #1: Introduction to Chemistry       TEST REVIEW: Introduction to Chemistry

 

 Mr. Z's Chemistry Internet Questions :        

What are elements?   Lesson Review
  1.  Define elements.
  2.  Are elements solids, liquids, or gas at room temperature?
  3.  Can matter be made up of something other then of the elements?
  4.  Can matter be made up of more then one element?
  5.  What elements make up water, salt, sugar?
  6. Sulfate is made up of Sulfur and Oxygen.  Can a chemist break down sulfates into simpler substances?
  7. What is the advantage of using chemical symbols.
  8.  What are the two rules for using symbols?
  9.  What does the symbols Fe, Au, Ag, Pb, N, O, C, S, Ca represent? (see periodic table)

What are atoms?    Lesson Review
  1.  Define atom.
  2.  List the four parts of the atomic theory.
  3.  What does the word Atomos mean in Greek?  (Use www.encarta.com)

What are the parts of an Atom?   Lesson Review
  1.  In a table, list the three parts of an atom, their location, mass and "charge"?
  2.  What was the contribution of Thompson to atomic theory?
  3.  What was the contribution of Bohr?
  4.  What was the contribution of Rutherford?
  5.  What was the order of their contributions by date?
  6.  Why is it important for scientists to share their discoveries?

What is atomic number and atomic mass?     Lesson Review
  1.  What does the atomic number stand for?
  2.  In the periodic table, how are elements arranged?
  3.  If an atom contains 12 protons and 15 neutrons, what is its atomic number?
  4.  Why are atoms neutral in charge?
  5.  Using a periodic table, which atom had an atomic number of 20.
  6.  What units are used to measure the mass of an atom?
  7.  Upon which parts of the atoms is this mass unit predicated?
  8.  How can you calculate the number of neutrons in an atom?

Review Worksheet

How are electrons arranged in an atom?
  1.  How many electrons can be held in the K, L, M levels?
  2.  What is the electron cloud?
  3.  What is the Electron Dot Diagram?
 

What is a compound?  Lesson Review

  1.  What are compounds made up of?
  2.  What do water and hydrogen create?
  3. Are the properties of a compound the same as  the properties of its elements?
  4.  When a an unknown solid is heated, two DIFFERENT gases are formed. Is the solid a compound or an element?  Explain.

What is a molecule?
  1.  Define molecule
  2.  What is a molecule made up of?
  3.  How many atoms are there in a molecule of water, salt, and sugar?
  4.  What is a diatomic molecule?
  5.  What does ratio mean? Give three examples.
What are mixtures?     Lesson Review
  1.  Define mixture.
  2.  What are the properties of a mixture like?
  3.  How are mixtures separated?  How does that differ from compound?
  4.  How are ratios different in compounds as compared to mixtures?
  5.  How could you separate a mixture of salt and water?  Iron and sand?
  6.  When you mix a particular poisonous gas, with a flammable metal, a white crystalline solid is formed that is neither flammable nor poisonous.  Is it a mixture or a compound?  Explain.

What is a Solution?  Lesson Review

  1. What is the solvent
  2. What is the solute
  3. What is the difference between soluble and insoluble
  4. How does Acid Rain form?

What are the properties of solutions?  Lesson Review

  1. What is a saturated solution?
  2. Contrast dilute and concentrated solutions.
  3. What effect do solutes have the Freezing Point and Boiling Points of the solvent?

 

Chemistry Review Sheet   Word Format

Chemistry Review Sheet   Web Format