CK12 Chemistry

Introduction to Chemistry

​What is Chemistry?

• Chemistry: the study of the composition, structure, and properties of matter, the processes that matter undergoes, and the energy changes that accompany these processes

  • What is something made of

  • What happens to something when the temperature changes

  • What happens when two things are mixed together

​What is Chemistry?

• There are six main types of chemistry, all focus on different things

  • ​Organic Chemistry: Studies carbon-containing compounds

    • Hint: Anything containing carbon is "organic"

  • Inorganic Chemistry: Studies non carbon containing compounds

  • Physical Chemistry: Studies how mater changes in response to energy

  • Analytical Chemistry: Identifies new elements and compounds

  • Biochemistry: Studies reactions inside living things

    • Hint: Bio means Living

  • Theoretical Chemistry: Uses math and models to predict reactions

​What are chemicals?

• A chemical is any substance that has a definite known composition

  • If we don't know what is in it or how it is made, we don't call it a chemical​

  • Sucrose Is a chemical we know the composition of: C₁₂H₂₂O₁₁

    • We use that information to make artificial versions with slightly different properties

​What do chemists do?

• Chemists preform research to help them learn about the world around them

  • Two Types of Research

    • Basic Research​: Research done to increase knowledge, with no set goal

      • Many "accidental" discoveries are made through basic research

    • Applied Research: Research done to solve a problem

Chemistry 1| Unit 0 Lesson 1

Fill in the Blanks

What is the study of the composition, structure, and properties of matter, the processes that matter undergoes, and the energy changes that accompany these processes

Match

Match the type of chemistry with what it studies

• Studies carbon-containing compounds

• Studies reactions inside living things

• Studies how mater changes in response to energy

• Identifies new elements and compounds

• Studies non carbon containing compounds

Organic Chemistry

Biochemistry

Physical Chemistry

Analytical Chemistry

Inorganic Chemistry

• Organic Chemistry

• Biochemistry

• Physical Chemistry

• Analytical Chemistry

• Inorganic Chemistry

Multiple Choice

Water is made up of two hydrogen atoms and one oxygen atom, with the formula H₂O. Is water a chemical?

• Yes

• No

• Only sometimes

​Matter and its properties

• Mass: the measure of the amount of matter in an object

  • Is not the same as the weight

    • Weight depends on gravity

  • Mass does not change regardless of where an object is

  • In other courses Mass can have additional meanings, but for right now this is all you need to know

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​Matter and its properties

• Matter: any object that has mass and takes up space

  • exists in 3 states on Earth, and a fourth in Space

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​Matter and its properties

• Element: a pure substance that can't be broken down into simpler, more stable substances

  • Carbon, oxygen, Nitrogen

• Atom: The smallest unit of an element that maintains the properties of that element

• All atoms are an element, and the two words can mean the same thing

Chemistry 1| Unit 0 Lesson 1

​Matter and its properties

• Compound: A substance made of two or more elements that can be broken down

  • All compounds are made up of atoms

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​Matter and its properties

• Extensive Properties of Matter: depend in the amount of matter that is present

  • Volume, Mass, amount of energy

• Intensive Properties: exist regardless of the amount of matter that is present

  • melting point

  • ability to conduct electricity

  • density

Multiple Choice

If you eat a Snickers bar, it will release a certain amount of energy. If you eat two Snickers bars, the amount of energy released is doubled. Which type property of matter is the release of energy?

• Extensive

• Intensive

Multiple Choice

True or False: Mass and weight are two words that mean the same thing.

• True

• False

​Matter and its properties

• Physical Properties: Can be observed with the senses without changing the identity of the substance

• Chemical Properties: tell how a substance will react with other substances

  • Tells how likely a substance is to turn into something else

​Matter and its properties

• All Matter can undergo two different types of changes

  • Physical Changes: can be observed without changing what the substance is

    • Melting

    • Grinding

    • Cutting

    • Boiling

    • Changing from one state to another

​Matter and its properties

• All Matter can undergo two different types of changes

  • Chemical Changes: Occur when one substance changes to another

    • Burning

    • Rotting

    • Rusting

    • Decomposing

Multiple Choice

Is the Following a Physical or Chemical Change: Ice Melting

• Physical

• Chemical

Multiple Choice

Is the Following a Physical or Chemical Change: Burning a Marshmallow

• Physical

• Chemical

How is Matter Classified?

• Matter is split into two main groups

  • Pure Substances: Compounds that does not vary from sample to sample

    • always looks and acts the same

Chemistry 1| Unit 0 Lesson 1

How is Matter Classified?

• Matter is split into two main groups

  • Mixtures: A blend of two or more kinds of matter, where each component of matter retains its own identity and properties

    • Homogenous: the mixture looks uniform and you can not see the separate parts

    • Heterogenous: A mixture is not uniform and you can see the separate parts

Chemistry 1| Unit 0 Lesson 1

Multiple Choice

In which mixture can you not see all of the parts?

• homogeneous

• heterogeneous

Multiple Select

Sugar and water

• Homogeneous

• Heterogeneous

Multiple Choice

Oxygen is a

• Homogeneous mixture

• Heterogeneous mixture

• Compound

• Element

Multiple Choice

Black pepper and water is which type of mixture?

• Homogeneous

• Heterogeneous

Drag and Drop

Chicken noodle soup is an example of a(n)

Placeholder

Drag these tiles and drop them in the correct blank above

Heterogeneous mixture

Homogeneous mixture

Compound

Element

Open Ended

Name three examples of chemistry in your everyday life.