Questions and Answers
What is matter?
That which occupies space and mass; a physical substance
What is an atom?
An extremely small part, quantity, or amount
What is a pure substance?
A sample of matter with both definite and constant composition with distinct chemical properties
What is an element?
Signup and view all the answers
What are compounds or molecules?
Signup and view all the answers
What is a mixture?
Signup and view all the answers
What does homogeneous mean?
Signup and view all the answers
What is a solution?
Signup and view all the answers
What does heterogeneous mean?
Signup and view all the answers
Which of the following are pure substances? (Select all that apply)
Signup and view all the answers
Which of the following is NOT a pure substance?
Signup and view all the answers
A substance that is made up of only one kind of atom is a(n)...
Signup and view all the answers
If an unknown substance CANNOT be broken down into simpler substances, it is....
Signup and view all the answers
What is the symbol for aluminum?
Signup and view all the answers
The symbol for gold is...
Signup and view all the answers
If a material contains two or more elements joined in a fixed proportion it is a(n)...
Signup and view all the answers
Water is a compound because it...
Signup and view all the answers
Which of the following is a mixture?
Signup and view all the answers
Which of the following is a characteristic of a mixture?
Signup and view all the answers
A mixture that appears to contain only one substance is a(n)...
Signup and view all the answers
Which of the following is a heterogeneous mixture?
Signup and view all the answers
A mixture can be classified as a solution, suspension, or colloid based on the...
Signup and view all the answers
You are about to open a container of soy milk but notice that there are instructions to 'shake well before serving.' The soy milk is most likely a...
Signup and view all the answers
Matter that always has exactly the same composition is classified as a pure substance.
Signup and view all the answers
Pure substances are either colloids or heterogeneous.
Signup and view all the answers
An element has a fixed composition because it contains only one type of atom.
Signup and view all the answers
A compound can be made from two or more elements or other compounds joined together in a fixed composition.
Signup and view all the answers
The substances in a heterogeneous mixture are evenly distributed throughout the mixture.
Signup and view all the answers
In a heterogeneous mixture, parts of the mixture are noticeably different from one another.
Signup and view all the answers
Study Notes
Classifying Matter
- Matter: Physical substance that occupies space and has mass.
- Atom: The smallest unit of matter; extremely small part or quantity.
- Pure Substance: Consistent and definite composition with unique chemical properties.
- Element: Fundamental substance consisting of only one type of atom.
- Compound/Molecule: Formed when two or more atoms bond together; represents a single substance.
- Mixture: Combination of two or more substances where each retains its own properties.
- Homogeneous Mixture: Uniform composition throughout; all components are the same kind.
- Solution: A specific type of homogeneous mixture consisting of a solute dissolved in a solvent.
- Heterogeneous Mixture: Non-uniform mixture with visibly different substances or phases.
- Characteristics of Pure Substances: Contains only one type of atom or molecule; has a fixed composition.
True or False Statements
- Pure substances maintain a consistent composition; they can be elements or compounds.
- An element is defined by its fixed composition of a single type of atom.
- A compound consists of multiple elements combined in fixed proportions.
- Heterogeneous mixtures display variations with distinct components that are not evenly distributed.
Application of Concepts
- A substance made of only one kind of atom is classified as an element.
- If a substance cannot be broken down further, it is categorized as an element.
- Chemical symbols for elements follow specific conventions (e.g., Aluminum is represented as Al, Gold is Au).
- Mixtures can be differentiated: for example, sand is a heterogeneous mixture, while sugar water is homogeneous.
- Suspensions involve larger particles that may settle, prompting the need for mixing (e.g., soy milk).
Classification Criteria
- Mixtures are classified based on particle size: solutions, colloids, and suspensions.
- Heterogeneous mixtures display components that are distinctly visible, while homogeneous mixtures appear uniform.
Key Definitions
- Colloid: A mixture where one substance is dispersed throughout another but does not settle out.
- Solution: Specifically a homogeneous mixture where solute particles are not visible.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on the classification of matter with this quiz. Explore concepts such as atoms, pure substances, elements, compounds, and mixtures. Determine whether statements about these topics are true or false.