L1.2 - Classification of Matter - Amanda Whitney | Library

Classification of Matter
Objectives: Students will...
... classify different types of matter within our world using element, compounds, mixtures, atoms, and pure substances
... investigate and discern different examples of matter with peer review and collaboration

1

What is matter? What are some different ways we might be able to classify matter? You may draw a picture if you like.

BEFORE YOU GET STARTED... Introduce yourselves to your new group!  Share your name and your favorite holiday.
Then, find your new:
Reader - Reads text out loud
Manager - Ensures everyone in the group is on the same question (is also timekeeper in groups of three)
Spokesperson - Shares screen if need be, is ready to share answers with the whole class
Timekeeper - Makes sure you all get back to the main group on time

Focus Question: How do atoms combine to make different types of matter?

Why?
Look at the things in the room. They are all matter. Matter may be a pure substance or it may be a mixture. Can you tell by looking at it? What if you looked under a microscope? Then could you tell? Something that looks pure may not really be pure. It depends on what type of particles an object or substance is mde of. In this activity we will explore how the smallest chemical units of matter determine whether something is classified as an element, a compound, or a mixture.

As a group, examine Model 1 below. 

Use the diagrams in Model 1 to answer questions 2-13.

1

Match the numbers below in order to answer the questions.

2
3
4

How many atoms are in a molecule of RSq?
How many different types of atoms are found in TSq2R ?
How many Sq atoms are in TSq2R ?
How many different types of atoms are found in the sample of SqR3 & TSq?
How many different types of molecules are found in the sample of SqR3 & TSq?

1

When two atoms are touching in the drawings of Model 1, what is holding the atoms together?

1

Which of the following statements best describes particles?

1

How many particles are in the drawing representing T & RSq & R in Model 1 (below)?

1

Using your answers for 4-5, come up with your own definition for the word "particle."

1

What do the letters R, Sq, and T codes represent?

Draggable item		Corresponding Item
T		Round
R		Square
Sq		Triangle

1

What do the small numbers (subscripts) in the codes represent?

1

When atoms are held together by a chemical bond, how is that communicated in the code?

1

What is the common characteristic of the samples in which an '&' is used?

1

Examine the samples whose codes were missing. Drag and drop the proper code for each. (Note: some diagrams may have more than one correct answer!)

R & Sq
Sq5R15
R3Sq
Sq2 & R
R2 & Sq8
RSq2
T
T7
SqR3
R & Sq2

1

Read This!
Matter is classified as a pure substance when all of the particles are identical. Matter is classified as a mixture if there are different types of particles present.

Identify which diagrams are of pure substances and which are mixtures.

Pure Substance
Mixture

1

Read This!
Elements are defined as pure substances made from only one type of atom. Compounds are defined as pure substances made from two or more types of atoms.

Identify which diagrams are of elements and which are compounds.

Element
Compound

1

How are the codes (chemical formulas) for pure substances different from those for mixtures?

1

How are the codes (chemical formulas) for elements different from those for compounds?

1

Using what you know about chemical formulas, identify each of the following as an element, a compound, or a mixture.

C
C6H12O6 & H2O
NaCl & H2O
NaCl
Al
CO2
Cu & Zn
NaHCO3
Br2

Element
Compound
Mixture

1

Explain the difference between an atom and an element.

1

Explain the difference between a compound and a molecule.

1

The following diagrams represent two typical answers given by students to explain the atom vs an element. Which drawing is the best representation of an element? Explain.

1

Categorize the following as elements, compounds, or mixtures

Element
Compound
Mixture

1

Determine the code (chemical formula) for the particle diagrams. Then classify them as either an element, compound, or mixture. (Note: You will NOT use all of the options!)

Sq5
RSq3
R2SqT
R8Sq24
R & SqT
Compound
Mixture
Sq2 & Sq3
R2 & SqT
Sq
Element

1

Using shapes, draw a particle diagram and write the code of a mixture of an element and a compound.

1

Classify the subtances below as an element, compound, or mixture. Then, click on the 'show your work' box and draw a particle diagram of each using the code (chemical formula) provided

Draggable item		Corresponding Item
T & R3Sq		Mixture of a compound and an element
Sq2T3		Compound
T2 & Sq & R3		Mixture of different elements

1

Identify the correct code for this diagram, and classify the substance as an element, compound, or mixture.

1

Identify the correct code for this diagram, and classify the substance as an element, compound, or mixture.

1

Identify the correct code for this diagram, and classify the substance as an element, compound, or mixture.

1

Draggable item		Corresponding Item
		Element
		Compound
		Mixture of two compounds
		Mixture of two elements
		Mixture of a compound and an element

1

Classify the following substances as elements, compounds, or mixtures. For the things that you're not sure about, think about what substance(s) might make up the matter (ingredients, etc.)

carbon dioxide gas (CO2)
table salt, NaCl
brass (Cu & Zn)
glass (SiO2 & Na2CO3 & CaCO3)
baking soda (NaHCO3)
100% lead bullets (Pb)
pure silver ring (Ag)
an OPENED can of coke
Italian salad dressing
steam (from cooking), H2O
oxygen gas (O2)

E (element)
C (compound)
M (mixture)

L1.2 - Classification of Matter

Classification of Matter

What is matter? What are some different ways we might be able to classify matter? You may draw a picture if you like.

BEFORE YOU GET STARTED... Introduce yourselves to your new group! Share your name and your favorite holiday.

Then, find your new:

Match the numbers below in order to answer the questions.

When two atoms are touching in the drawings of Model 1, what is holding the atoms together?

Which of the following statements best describes particles?

How many particles are in the drawing representing T & RSq & R in Model 1 (below)?

Using your answers for 4-5, come up with your own definition for the word "particle."

What do the letters R, Sq, and T codes represent?

What do the small numbers (subscripts) in the codes represent?

When atoms are held together by a chemical bond, how is that communicated in the code?

What is the common characteristic of the samples in which an '&' is used?

Examine the samples whose codes were missing. Drag and drop the proper code for each. (Note: some diagrams may have more than one correct answer!)

Read This!Matter is classified as a pure substance when all of the particles are identical. Matter is classified as a mixture if there are different types of particles present.Identify which diagrams are of pure substances and which are mixtures.

Read This!Elements are defined as pure substances made from only one type of atom. Compounds are defined as pure substances made from two or more types of atoms.Identify which diagrams are of elements and which are compounds.

How are the codes (chemical formulas) for pure substances different from those for mixtures?

How are the codes (chemical formulas) for elements different from those for compounds?

Using what you know about chemical formulas, identify each of the following as an element, a compound, or a mixture.

Explain the difference between an atom and an element.

Explain the difference between a compound and a molecule.

The following diagrams represent two typical answers given by students to explain the atom vs an element. Which drawing is the best representation of an element? Explain.

Categorize the following as elements, compounds, or mixtures

Determine the code (chemical formula) for the particle diagrams. Then classify them as either an element, compound, or mixture. (Note: You will NOT use all of the options!)

Using shapes, draw a particle diagram and write the code of a mixture of an element and a compound.

Classify the subtances below as an element, compound, or mixture. Then, click on the 'show your work' box and draw a particle diagram of each using the code (chemical formula) provided

Identify the correct code for this diagram, and classify the substance as an element, compound, or mixture.

Identify the correct code for this diagram, and classify the substance as an element, compound, or mixture.

Identify the correct code for this diagram, and classify the substance as an element, compound, or mixture.

Classify the following substances as elements, compounds, or mixtures. For the things that you're not sure about, think about what substance(s) might make up the matter (ingredients, etc.)

Read This!
Matter is classified as a pure substance when all of the particles are identical. Matter is classified as a mixture if there are different types of particles present.

Identify which diagrams are of pure substances and which are mixtures.

Read This!
Elements are defined as pure substances made from only one type of atom. Compounds are defined as pure substances made from two or more types of atoms.

Identify which diagrams are of elements and which are compounds.