9/14/09 1. which is a mixture? a.liquid nitrogen in a tank b.pure gold c.ocean water d.table salt...

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9/14/09 1. Which is a mixture? a.Liquid nitrogen in a tank b.Pure gold c.Ocean water d.Table salt (NaCl) 2. Which element in the table is listed first in the periodic table? e.Oxygen f.Carbon g.Gold h.Calcium Oxygen 8 Carbon 6 Gold 79 Calcium 70

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Page 1: 9/14/09 1. Which is a mixture? a.Liquid nitrogen in a tank b.Pure gold c.Ocean water d.Table salt (NaCl) 2. Which element in the table is listed first

9/14/091. Which is a mixture?a. Liquid nitrogen in a tankb. Pure goldc. Ocean waterd. Table salt (NaCl)

2. Which element in the table is listed first in the periodic table?

e. Oxygenf. Carbong. Goldh. Calcium

Oxygen 8Carbon 6Gold 79Calcium 70

Page 2: 9/14/09 1. Which is a mixture? a.Liquid nitrogen in a tank b.Pure gold c.Ocean water d.Table salt (NaCl) 2. Which element in the table is listed first

99/ 99/15/09

1. A molecule of hydrogen peroxide is shown. Which of the following shows the correct chemical formula for this molecule?

a. HOb. HO2

c. H2O2

d. H2O

2. In which substance are molecules rigidly arranged?e. The water in a freezer at -2°Cf. The water in a cup at 22°C (room temp)g. The water in a pot at 100°Ch. The water in a steam engine at 110°C

OO

H

H

Page 3: 9/14/09 1. Which is a mixture? a.Liquid nitrogen in a tank b.Pure gold c.Ocean water d.Table salt (NaCl) 2. Which element in the table is listed first

9/16/091. A state of matter in which a substance has a definite

volume, but lacks a definite shapea. Solidb. Plasmac. Gasd. Liquid

2. When matter changes from a liquid to a gas this happense. Freezingf. Condensationg. Meltingh. Vaporization

Page 4: 9/14/09 1. Which is a mixture? a.Liquid nitrogen in a tank b.Pure gold c.Ocean water d.Table salt (NaCl) 2. Which element in the table is listed first

9/17/09

1. Many drain cleaners contain a substance called sodium hydroxide. Sodium hydroxide is formed when sodium, oxygen and hydrogen join chemically. How is sodium hydroxide classified?

a. A solutionb. A compoundc. An elementd. A mixture

2. What does the law of conservation of matter state?e. The total mass of the reactants is greater than the total mass of

the product?f. The total mass of the reactants is less than the total mass of the

productsg. The total mass of the reactants equals the total mass of the

productsh. Matter can not change form

Page 5: 9/14/09 1. Which is a mixture? a.Liquid nitrogen in a tank b.Pure gold c.Ocean water d.Table salt (NaCl) 2. Which element in the table is listed first

9/18/091. A state of matter where there is not definite shape or no

definite volume a. Liquidb. Solidc. Gasd. Melting

2. The diagram shows the entry for one of the elements in the periodic table. Based on the diagram an atom of Argon has

e. 18 protonsf. 18 neutronsg. 40 protonsh. 40 electrons

18

ArArgon40.0

Page 6: 9/14/09 1. Which is a mixture? a.Liquid nitrogen in a tank b.Pure gold c.Ocean water d.Table salt (NaCl) 2. Which element in the table is listed first

Answer Key1. C/B2. C/A3. D/D4. B/C5. C/A

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