Pure Substances and Mixtures, Pre-Summative Review, 2022

This Quizizz is a Review​ LESSON. Please take the time to read each and every line of EACH slide before advancing to next. If you need to go back to review, do so. The timer is disabled to allow you to process and think about your answers. Thank you.

​Please read before starting Lesson.

​

​Classes of Matter

​All matter is classified as a Pure Substance OR a Mixture of substances.

Multiple Choice

All matter is classified as either...

• a compound of elements or a mixture of elements

• a pure substance or a mixture of substances

• positively charged or negatively charged

• made up of 2 or MORE different substances PHYSICALLY combined.​

​Mixture (of substances)

• A substance that is chemically uniform throughout the substance.

• Made of IDENTICAL particles.

• can be an ELEMENT or a COMPOUND.

I

​Pure Substance

​Pure Substances -vs- Mixtures

Multiple Select

Which of the following are true of Pure Substances?

• can be an element or a compound

• chemically uniform throughout

• made of identical particles

• parts physically combined

Multiple Select

Which of the following are Pure Substances?

• compounds

• elements

• mixtures

​More about Pure Substances

• made ONLY 1 kind of atom

• can NOT be broken down into a simpler substance (by any means)

  ​

• made of 2 or more different types of atoms

  CHEMICALLY combined​

• can be broken down into original substances by CHEMICAL means only

​ELEMENTS

​COMPOUNDS

Multiple Choice

How does an element differ from a compound?

• An element contains multiple substances, and a compound contains only one pure substance.

• An element is highly reactive, and a compound is stable.

• An element is made of a single type of atom and a compound is made of two or more types of atoms.

• An element can exist in any state, and a compound can only be gas.

Multiple Select

Which of the following diagrams is an element?

Multiple Select

Choose the diagrams that represent a compound.

​Pure substances and Chemical Symbols

​Elements

​Compounds

Because Pure Substances are chemically uniform throughout the substance, they are represented by a chemical symbol (element) or formula (compound).​

​

• formula will have more than 1 uppercase letter since its made of more than 1 atom

• Ex. (NaCl, FeO)

• Represented by a symbol that consists of 1 or 2 letters

• ONLY the first letter is uppercase, so an element will have only 1 uppercase letter. (Ex. He, O, Fe)

​More on Chemical Symbols

​Elements

​Compounds

• more than 1 uppercase letter

  • = more than 1 type of atom = COMPOUND

• Examples:

  • Iron Oxide - FeO

  • Sodium Chloride - NaCl

  • Water - H2O

• 1 uppercase =

  • 1 type of atom = ELEMENT

• Examples:

  • Iron - Fe

  • Oxygen - O

  • Hydrogen - H

  • Sodium - Na

Multiple Select

Which of the following substances are elements?

• Ag

• NaHCO₃

• KF

• H₂

Multiple Select

Choose all substances that are elements.

• Hydrogen

  ( H )

• Iron Oxide

  (Fe₂O₃)

• Baking Powder

• Silicon

  ( Si )

Multiple Select

Which of the following are elements?

• Oxygen

  O

• Hydrogen

  H₂

• Water

  H₂O

• Lemonade

Multiple Select

Which of the following substances are compounds?

• Potassium Flouride

  KF

• Sugar

  C₁₂H₂₂O₁₁

• Iron

  Fe₂

• Iron Oxide

  Fe₂O₃

​More about Mixtures...

• The different substances in a mixture are PHYSICALLY combined.

​

• Because they are only PHYSICALLY combined, the different substances keep thier original properties.

• P​arts of a mixture can be separated by PHYSICAL means.

​

​

​

Multiple Select

Which of the following are true of Mixtures?

• made of identical particles

• parts physically combined

• can be homogenous or heterogeneous

• chemically uniform throughout

​If parts are big enough, you can use your fingers or a utensil to separate.

​​Pick out

​

​To separate parts of a suspension (when solid particles settle out), a filter can be used.

​​Filter out

​

​You can use special properties of a substance to separate. In this example, iron can be separated from the mixture because it is magnetic.

​​Use magnet

​To separate parts of a solution, you can boil the water into a gas and the solid will remain.

​​Boiling water

​​Examples of PHYSICALLY separating parts of a mixture

​

• Different parts are visible.

• uneven distribution of parts

• least mixed of all mixtures

• Easiest mixture to separate​

​Heterogeneous

• appears the same throughout.

• can NOT see different parts

• very well mixed

• MOST are Solutions (a substance dissolved in another)​

​Homogeneous

​Mixtures: Same or Different?

Mixtures are classified as Homogeneous or Heterogeneous.​

​Homogeneous

Examples​

​Heterogeneous

Examples​

Multiple Choice

Trail mix is a heterogenous mixture because __.

• it can be physically separated

• you can see the different parts

• the parts are edible

• it is made of more than 2 different substances

Multiple Choice

Which of the following substances are homogeneous?

• fruit salad

• coffee

• chicken noodle soup

• chocolate chip cookie

Multiple Choice

Which of the pictures represent a heterogenous mixture?

Multiple Select

Which of the following are Pure Substances?

• compounds

• elements

• mixtures

Multiple Select

Which of the following substances are pure substances?

• Baking Soda

  (NaHCO₃ )

• Baking Powder

• steel

• Gold

  (Au)

Multiple Select

Which of the following substances are elements?

• Ag

• NaHCO₃

• KF

• H₂

Multiple Choice

Which of the following substances are compounds?

• O₂

• Cl₂

• Au

• HF

Multiple Choice

Rust (Fe₂ O₃) is a ______.

• mixture of 2 compounds

• compound of 3 elements

• mixture of 2 elements

• compound of 2 elements

Multiple Choice

The air we breathe is made of many different gases, including Oxygen, Nitrogen, and trace amounts of Argon. The ratio of the gases may vary depending on location. Based on this information, what class of matter is air?

• a mixture

• a compound

• a pure substance

• an elemnet

Multiple Choice

Which of the following substances can be physically separated?

• Pure substances

• Mixtures

• Compounds

• Elements

Multiple Choice

Which of the following can be separated by chemical means only.

• all pure substances

• elements

• compounds

• mixtures

Multiple Choice

Which of the following models is a mixture of elements and compounds?

Multiple Choice

One type of homogeneous mixture is when one substance is dissolved in another substance. This is called a(n) __________.

• solution

• ion

• plasma

• atom

Multiple Choice

One type of mixture is a solution. Usually, when we think of a solution, we think of a liquid, but it can also be a solid or a liquid. For example, metals can combine to form a solution. A mixture of metals is called ______.

• an ion

• an alloy

• a compound

• an element

Multiple Select

Which of the following descriptions are true of a homogeneous mixture?

Choose all that apply.

• can be physically separated

• appears the same throughout

• physically combined

• has a chemical formula

Multiple Choice

You will need to know the more common compounds, even when the chemical formula is not included, so I have not included formulas for any of the choices.

Which of the following is a compound?

• iced tea

• water

• milk

• air

Match

Match the following terms.

• Pure substance

• Solution

• Compound

• Mixture

• Element

a substance in which there is only 1 type of particle

a homogeneous mixture that forms when 1 substance dissolves in another

a pure substance made up of at least 2 different elements that are chemically combined

2 or more substances that are combined physically

a pure substance that cannot be separated into simpler substances by physical or chemical means.

• a substance in which there is only 1 type of particle

• a homogeneous mixture that forms when 1 substance dissolves in another

• a pure substance made up of at least 2 different elements that are chemically combined

• 2 or more substances that are combined physically

• a pure substance that cannot be separated into simpler substances by physical or chemical means.

Match

Match the following

• Atom

• molecule

• alloy

• heterogenous mixture

• homogeneous mixture

smallest particle of an element

a group of atoms bonded together

a mxture of metals

a mixture in which you can see the dfferent parts

a mixture in which you can not see the different parts

(looks same throughout)

• smallest particle of an element

• a group of atoms bonded together

• a mxture of metals

• a mixture in which you can see the dfferent parts

• a mixture in which you can not see the different parts

  (looks same throughout)

Match

Match the models with the correct description.

Mixture of Compounds

Mixture of Elements

Mixture of both Elements and Compounds

Element

Compound

• Mixture of Compounds

• Mixture of Elements

• Mixture of both Elements and Compounds

• Element

• Compound

Multiple Choice

Which of the following models represents an element?

Multiple Choice

Which of the following models represents a compound?

Multiple Select

Which of the following models are pure substances?

Multiple Choice

Which class of matter can not be broken down by any means?

• mixture

• element

• compound

• pure substance

Multiple Choice

Which of the following models represents a mixture compounds?

Multiple Choice

Which of the following substances are heterogeneous mixtures?

• chicken noodle soup

• sodium chloride

  salt

  (NaCl)

• sugar dissolved in water

• orange juice

Multiple Select

Which of the following are homogeneous mixtures?

• chocolate chip cookies

• sodium chloride

  Salt

  (NaCl)

• saltwater

• air

Multiple Choice

How does an element differ from a compound?

• An element contains multiple substances, and a compound contains only one pure substance.

• An element is highly reactive, and a compound is stable.

• An element is made of a single type of atom and a compound is made of two or more types of atoms.

• An element can exist in any state, and a compound can only be gas.

Poll

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4-totally understand

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Open Ended

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