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Periodic Table
Physical Properties
Chemical Properties
Scientific Notation
Significant Figures
100
What is the atomic number for Carbon?

6

100

True or False: Physical properties can be observed without changing the substance into another substance.

True

100

Gallium melts from a solid into a liquid at 86 degrees F (30 degrees C). Is this an example of a physical change or a chemical change?

Physical Change

The Gallium has changed states, but it's still gallium.

100

3504.591

Is this number written in standard form or scientific notation?

Standard Form

100

Which digits are ALWAYS considered to be significant?

1, 2, 3, 4, 5, 6, 7, 8, and 9

200

What is the atomic symbol for Gold?

Au

200

Which physical property measures how much space a substance takes up?

mass -or- volume -or- density

volume

200

True or False: You have to observe a chemical change in order to know that a chemical change has happened.

True

200

Write 2.53 x 103 in standard form.

2,530

200

How many sig figs in 426,000?

3

300

What is the atomic mass of Helium?

4.0026

300

Which of these physical properties can be used to describe a liquid?

Volume, Malleability, Viscosity, Opacity, Hardness

Volume, Viscosity, and Opacity

300
Two liquids are combined and a yellow precipitate forms. What is a precipitate?
A precipitate is a solid that forms during a chemical reaction when two liquids are combined.
300

Write this number in scientific notation:

37,638

3.7638 x 104

300

How many sig figs in 40.50?

4

400

Which element "family" does Copper belong in?

Transition Metals

400

What is the formula for finding density?

Density = 

Density = Mass / Volume

400

Name two changes you might observe during a chemical reaction.

Color change, bubbles forming, temperature change, light emission, precipitate forming

400

If you change the following number from standard form to scientific notation, which direction will the decimal move (left or right), AND how many places?

2,491,038.00045

The decimal will move 6 places to the left.


***Daily Double***

Will the exponent be positive or negative?

400

How many sig figs will be in the answer to this problem (the answer will need to be rounded to how many sig figs?):

34.5 x 62 x 44.4 = 

2

500

How many protons does an atom of Oxygen have?

8

The atomic number tells you how many protons an atom of that element has!

500

If you have 4.5 cm3 of aluminum and 4.5 cm3 of silver, which one will have a greater density?

100 extra points if you can explain why!

Silver

Silver has a higher mass than aluminum. If you have the same volume of two substances, the one with the greater mass will have the greater density.

500

Which of these is NOT a chemical property?

radioactivity, flammability, solubility, oxidation

Solubility

500

Write this number in standard form:

1.0004 x 100

1.0004

500

Add these amounts together. (You'll need to round your answer to the correct number of decimal places!)

12.61  +  26.0  +  0.044

38.7