JQ Eighth

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journal questions for 8th graders 3rd quarter 2009.

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01/12/09

•Give three examples of an element.

01/13/09

•What is the difference between an element and a compound?

01/14/09

•Give three examples of compounds.

01/15/09•Define these mixtures:

– Fog– Diet coke– Chili– Chocolate chip cookie dough– Mouthwash– Butter

01/19/09•List three indications of a chemical reaction as observed in the “Rxn in a Bag” lab.

01/20/09•List the elements found in the compound AgNO3

01/21/09•List the elements found in the compound BaCrO4

01/22/09•How many atoms are in the compound Hg2SO4?

•Bring $1 for our lab!

01/23/09

•List the elements and number of atoms found in C12H22O11

01/26/09

•List the elements considered to be inert gases.

01/27/09

•Draw Lithium as a Bohr diagram

01/28/09

•How many shells does each atom have in the row starting with potassium?

01/29/09

•How many e- do the halogens have in their valance?

02/02/09

•What causes the dye to spread?

02/03/09Compare the mass of the molecules at the center & edge of a chromatography spread. Why?

02/04/09Give an example of a molecule with a covalent bond.

02/05/09Give an example of a molecule with an ionic bond.

02/06/09•Describe the difference between a covalent and an ionic bond.

02/09/09•What is an emulsion?

02/10/09•Order these from smallest to largest:

•Mixture, quark, atom, molecule, electron,

02/11/09•Name two ways that a suspension can be separated.

02/18/09•Name two ways that a solution can be separated.

02/19/09•What type of mixture is an emulsion?

02/20/09•Describe the Tyndell Effect.

02/23/09•How would you separate a mixture of sugar, sand & H2O?

02/24/09•You should be cramming for your test!

02/25/09•You should be finishing your test!

02/26/09•Explain the Greek meaning of the word “atom.”

03/06/09•Draw and explain Thompson’s atom model.

03/09/09•Draw and explain Rutherford’s atom model.

03/10/09•Draw and explain Bohr’s atom model.

03/24/09

•What is an isotope?

03/25/09•Which particle consistently determines element type?

03/26/09•Which isotope has one proton and one neutron?