Classifying Matter Concepts

Questions and Answers

What is a pure substance?

A substance with varying characteristics

A substance made up of two or more types of atoms

A substance that can be separated by physical means

A substance that cannot be separated by physical means (correct)

What are elements made of?

One type of atom

An atom is the smallest unit that maintains the chemical identity of an element.

True

Which statement is true about compounds?

Compounds are made up of two or more types of atoms bonded together Signup and view all the answers

What is a mixture?

Blend of two or more kinds of matter Signup and view all the answers

Homogeneous mixtures have uniform composition.

True Signup and view all the answers

What are alloys?

Solid solutions that contain at least one metal Signup and view all the answers

Heterogeneous mixtures have uniform composition.

False Signup and view all the answers

What is a suspension?

Heterogeneous mixture where particles eventually settle out Signup and view all the answers

What is a colloid?

Heterogeneous mixture that won't separate upon standing Signup and view all the answers

Study Notes

Pure Substance

Cannot be separated by physical means; consistent characteristics across samples.
Identified as chemicals.

Elements

Composed of a single type of atom.
Listed on the Periodic Table.

Atom

The smallest unit maintaining the chemical identity of an element.
Represents the fundamental building block of matter with unique properties.

Compounds

Formed from two or more different types of atoms that are chemically bonded.
Require chemical methods for separation; physical methods are insufficient as bonds must be broken.

Mixture

A blend of two or more types of matter, which can include elements and/or compounds.
Each component retains its individual identity and properties.

Homogeneous Mixtures

Also known as solutions.
Possess a uniform composition throughout; particles are too small to be visible.

Alloys

Solid solutions that include at least one metal.
Created by blending metals to enhance desirable properties.

Heterogeneous Mixtures

Characterized by a non-uniform composition; components can often be distinguished from one another.

Suspension

A type of heterogeneous mixture where particles will eventually settle out over time.

Colloid

A heterogeneous mixture that does not separate upon standing.
Cannot be separated through filtration; contains larger particles that scatter light.

Description

This quiz covers foundational concepts of matter classification, including pure substances, elements, and atoms. Test your knowledge on the definitions and characteristics of these key terms that form the basis of chemistry. Perfect for students learning about the properties of matter!