Chapter 3 Review

Per. Table I

100

What is the chemical symbol of silver?

What is Ag?

200

How many groups in the periodic table?

What is 18?

300

There are seven of these?

What are periods (of the periodic table)?

400

The last group of the periodic table

What are the noble gases?

500

I have mass but no charge

What is a nuetron?

Phys. & Chem. Change

100

Is a melted popsicle an example of a physical change?

What is YES? You can melt and refreeze a popsicle and it will still be a popsicle.

200

Is Alka-Seltzer and water an example of a physical change?

What is NO? When you mix Alka-Seltzer and water, bubbles form, which indicates a chemical change as taken place.

300

Name a food that is an example of a physical change.

What is a salad or trail mix?

400

Explain how water could be an example of a physical change.

What is freezing and melting water to and from ice is an example of a physical change?

500

CHALLENGE (not a quiz question): Explain how the water cycle an example of a physical change.

What is YES, it is a physical change, because water changes from a liquid/solid when it precipitates, to a gas when it evaporates, then forms back into a liquid when it condensates. Then the process repeats again with the same substance, WATER!

Matter

100

Another name for a homogeneous mixture

What is a solution?

200

Two or more different atoms, chemically bonded

What is a compound?

300

Matter can be divided into two categories

What is a pure substance and a mixture?

400

A mixture can be divided into two categories

a) what are the two

b) how are they visibly different from one another

a) What is homogeneous and heterogeneous

b) the same throughout vs. non-uniform distribution

500

CHALLENGE (not a question) what are the four different types of matter? 

element

compound

homogeneous

heterogeneous

Per. Table II

100

two atoms of hydrogen bond with one atom of oxygen

What is water?

200

Number of atoms in NaCl.

What is two?

300

Sn is the symbol for which element?

What is tin?

400

A nuetral atom of chlorine has ____ many electrons?

What is 17?

500

The chemical formula of eight carbon atoms, 18 hydrogen atoms, and seven oxygen atoms

What is C8 H18 O7

Properties

100

You use these to help you identify the physical properties.

What are YOUR SENSES?

200

Name 2 physical properties of ice.

What are cold, hard, solid, wet, etc.?

300

Name 2 physical properties of water.

What is liquid, wet, odorless, etc.

400

Explain how iron fillings and sand can be separated using physical properties.

What is iron is magnetic and sand is not, so you can use a magnetic wand to separate the two substances?

500

CHALLENGE (not on quiz). We can separate salt and water using physical properties. What do we call this process of evaproating the water to separate the salt?

What is DESALINATION?