Unit 1.1 Elements and Test Review powerpoint. 1. Define Element.

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Presentation transcript:

Unit 1.1 Elements and Test Review powerpoint

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?

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 SiliconSi HydrogenH Sodium Na SulfurS Calcium Ca

4. Circle all of the elements below: wateroxygen carbon dioxideneon solutionmixture compoundone kind of atom

4. Circle all of the elements below: wateroxygen carbon dioxideneon solutionmixture compoundone 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?

NITROGEN & OXYGEN

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

Nitrogen

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?

O X Y G E N

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

Carbon

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!