Unit 1.1 Elements andTest Reviewpowerpoint

1. Define Element

1. Define Element

• An element is a PURE substance that CANNOT be broken down or changed into another substance .

• An element is made of only one type of ATOM.

2. What is the rule for writing element symbols with 2 letters?

2. What is the rule for writing element symbols with 2 letters?

• THE FIRST LETTER IS UPPERCASE.

• The second letter is lowercase.

• Examples: He, Cu, Kr

3. Write the elemental symbols for:

• Helium ____• Silicon ____• Hydrogen ____• Sodium ____• Sulfur ____• Calcium ____

3. Write the elemental symbols for:

• Helium He• Silicon Si• Hydrogen H• Sodium Na• Sulfur S• Calcium Ca

4. Circle all of the elements below:

water oxygen

carbon dioxide neon

solution mixture

compound one kind of atom

4. Circle all of the elements below:

water oxygen

carbon dioxide neon

solution mixture

compound one kind of atom

5. What are the four (4) elements that make up a large part of anything living?

(Remember PEOPLE COUNT, too!)

5. What are the four (4) elements that make up a large part of anything living?

CARBON HYDROGEN OXYGEN NITROGEN

6. What two elements make up most of the atmosphere?

6. What two elements make up most of the atmosphere?

• NITROGEN & OXYGEN

7. What is the most abundant element in the atmosphere?

7. What is the most abundant element in the atmosphere?

• Nitrogen

8. What two elements are most abundant in the Earth’s crust?

8. What two elements are most abundant in the Earth’s crust?

• SILICON & OXYGEN

9. What single element is found in all four of Earth’s systems?

9. What single element is found in all four of Earth’s systems?

O X Y G E N

10. What single element is found in all living things?

10. What single element is found in all living things?

• Carbon

11.) How is an element different from a compound?

11.) How is an element different from a compound?

• An element is a pure substance made of only one kind of atom that cannot be broken down.– Examples: Hydrogen, Oxygen, Helium, Gold, Silver

• A compound is a molecule made of at least two different types of elements that are chemically combined.

Is an example of an…

ELEMENT

WHY??

Characteristics of a Compound.• Compounds are made of 2 or more different

elements• Compounds are chemically combined and

have a formula.• Made of elements of a specific ratio.• Compounds cannot be broken down easily.

Can only be broken down chemically, not physically

Ways to Study• Complete the review guide• Check your answers on the review while your

teacher goes over them• Have someone quiz you• Create flash cards (questions on front, answers on

back) from your study guide (worth 10 extra points on your lowest daily grade)

• Read questions and answer OUT LOUD!!• Teach someone what you know (your

parent(s)/siblings make great listeners)

GO HOME AND STUDY!!• If you make flash cards, you’ll get extra credit!