Name: ________________________

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Unit 3: Chemistry – Matter and Elements Unit 3 Review Packet

TEKs: 

6.5A – know that an element is a pure substance represented by chemical symbols.



6.5B – recognize that a limited number of the many known elements comprise the largest portion of solid Earth, living matter, oceans, and the atmosphere.



6.5C – differentiate between elements and compounds on the most basic level.



6.5D – identify the formation of a new substance by using the evidence of a possible chemical change such as the production of gas, change in temperature, production of a precipitate, or color change.



6.6A – compare metals, nonmetals, and metalloids using physical properties such as luster, conductivity, or malleability.



6.6B – calculate density to identify an unknown substance.

The TEKs I am strong in are: ____________________________________________________________________________________ ____________________________________________________________________________________________________________ ____________________________________________________________________________________________________________ The TEKs I struggle with are: ____________________________________________________________________________________ ____________________________________________________________________________________________________________ ____________________________________________________________________________________________________________ My study plan for the unit 1 test is: ______________________________________________________________________________ ____________________________________________________________________________________________________________ ____________________________________________________________________________________________________________

UNIT 3 REVIEW: Vocabulary Matching: Word bank is on the next page. Match the term in the box to the correct definition. 1. 2.

3. 4. 5. 6. 7.

Elements are located on the ___________________ ______________ _________ _______________________. The smallest particle of an element that still has the properties of that element is called an ________________________. The ability to be shaped into thin wires is known as ___________________________________. These elements have both properties of metals and non-metals; ______________________________________. The amount of matter in a substance. _______________________________ Element names are shortened into ______________________ ________________________________. Compounds are written as ___________________________ ___________________________________.

8. 9. 10. 11. 12. 13.

14.

The amount of matter in a given space. _____________________________ These elements are shiny, malleable, ductile, and not brittle - _______________________________. The ability to be hammered into thin sheets is known as _____________________________________. The amount of space an object takes up. __________________________________ A __________________________________ is when a solid is formed from two liquids. ______________________________ are pure substances that cannot be broken down into simple substances. These elements are on the right side of the black zig-zag line on the Periodic Table __________________________________.

Name: ________________________

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Date: ________________________

Word Bank:     

    

Mass Metalloids Volume Periodic Table of Elements Chemical Symbols

   

Ductile Density Non-metals Elements Metals

Atoms Malleability Chemical Formula Precipitate

6.5A: Elements and chemical symbols Use the Periodic Table of Elements to identify the element name or chemical symbol of the following elements. 1.

________ Oxygen

6.

K _______________________

2.

________ Hydrogen

7.

Au ______________________

3.

________ Iron

8.

He ______________________

4.

________ Carbon

9.

B _______________________

5.

________ Neon

10. N _______________________

Open-Ended Response Answer the questions below. Write in complete sentences. 1.

What are the three ways we can use to identify if a substance is an element?

__________________________________________________________________________________________________ __________________________________________________________________________________________________ __________________________________________________________________________________________________ __________________________________________________________________________________________________ 6.5C: Elements vs. Compounds

Identification Count and list the number of elements that make up the following compounds.

HO4CSiNe2

KCHe2O3Fe

NaClB

CS2FeO

H2SFeNO3K

Name: ________________________

Pod: ____________________________

Date: ________________________

Open-Ended Response Answer the questions below. Write in complete sentences. 1.

What are the three ways we use to identify a substance is a compound?

__________________________________________________________________________________________________ __________________________________________________________________________________________________ __________________________________________________________________________________________________ __________________________________________________________________________________________________ 2.

Explain two differences between elements and compounds.

__________________________________________________________________________________________________ __________________________________________________________________________________________________ __________________________________________________________________________________________________ __________________________________________________________________________________________________ __________________________________________________________________________________________________ 6.5D: Formation of new substances List the 5 pieces of evidence of a chemical change: 1. 2. 3. 4. 5.

Chemical or Physical? Determine if the following is a physical change or a chemical change.

Description of change using properties

Physical or Chemical Change (Circle one)

Kool-Aid dissolving in water (mixing in)

Physical Change Chemical Change

A rusting nail

Physical Change Chemical Change

The statue of Liberty changing color overtime Burning paper changes its color, mass, volume, and flammability

Physical Change Chemical Change

Water changing state of matter into ice.

Physical Change Chemical Change

Two liquids combining and forming a solid.

Physical Change Chemical Change

Physical Change Chemical Change

Name: ________________________

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Date: ________________________

6.6A: Metals, Non-Metals, and Metalloids Fill in the properties for metals, metalloids, and non-metals in the table below.

Metals

Metalloids

Non-Metals

6.6B: Density Answer the questions below. Write in complete sentences. 1.

What is the formula for density?

2.

What units are used to label the mass?

5.

A sample of an unknown substance has a mass of 4.2g and a volume of 6 cm3. Calculate the density of this substance.

6.

A cube measures 3 cm on each side. If the mass is 5.4 g, what is the cube’s density?

3.

What two units are used to label the volume?

4.

What two units are used to label the density?

7.

A toy dinosaur with a mass of 4 g is placed inside a graduated cylinder with 4.8 mL of water. What is the density of the dinosaur?

Name: ________________________

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Date: ________________________

Multiple Choice Practice 1.

Water (H2O) is not found on the Periodic Table of Elements because water is a. An atom b. A liquid c. A mixture d. A compound

2.

What is a substance made of only one type of atom? a. A compound b. A solution c. An element d. A mixture

3.

Carbon dioxide is a gas that is found in the air you breathe out. Carbon dioxide is made up of two different pure substances, carbon and oxygen. Which of the following would be classified as an element? a. Air b. Gas c. Oxygen d. Carbon dioxide During a science lab, you mixed two unknown substances and observed bubbles. What can you conclude about why the bubbles formed? a. A chemical reaction produced a gas. b. Only a physical change occurred. c. The temperature of the substance changed. d. No chemical reaction took place. Which of the following observed properties is most reliable in classifying a substance as a metal? a. Brittle b. Cannot be hammered into thin sheets. c. Cannot be formed into a thin wire. d. Good conductor of heat. Which statement best describes most non-metals? a. Most non-metals have a dull surface. b. Most non-metals are poor conductors of electricity. c. Most non-metals can be shaped into a wire. d. Most non-metals have a shiny surface. An unknown substance has a volume of 3 mL and a mass of 3.6 g. What is the density of this substance? a. 0.3 g/mL b. 1.2 g/mL

4.

5.

6.

7.

c. d. 8.

3 g/mL 6 g/mL

Three liquids layered in a graduated cylinder are shown with their densities. What conclusion can be made about the physical properties of the liquids?

a.

9.

10.

Gasoline is more dense in comparison to water. b. Water is denser in comparison to Mercury. c. Mercury is at the bottom because of its buoyancy. d. Mercury is the most dense of the three liquids. An unknown substance has a density of 1.2 g/cm3. What is true for this substance? a. This object will float in water. b. This object will sink slightly in water. c. This object is less dense than water. A sample of an unknown substance has a mass of 28.8 g and a volume of 4 cm3. Based on its density, it could be which of the following substances? Metal

Density g/cm3

Gold

19.3

Iron

7.8

Lead

11.3

Tin

7.2

a. b. c. d.

Gold Iron Lead Tin