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Questions and Answers
Which type of matter is a compound?
Which type of matter is a compound?
What kind of mixture is a suspension?
What kind of mixture is a suspension?
Which statement about elements is correct?
Which statement about elements is correct?
What distinguishes a compound from a heterogeneous mixture?
What distinguishes a compound from a heterogeneous mixture?
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How are suspensions and colloids different?
How are suspensions and colloids different?
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What is the defining characteristic of a substance?
What is the defining characteristic of a substance?
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How is an element different from a compound?
How is an element different from a compound?
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Which statement about elements is accurate?
Which statement about elements is accurate?
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What distinguishes a homogeneous mixture from a compound?
What distinguishes a homogeneous mixture from a compound?
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Which type of mixture contains particles that never settle?
Which type of mixture contains particles that never settle?
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How do compounds differ from mixtures?
How do compounds differ from mixtures?
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What makes an element unique?
What makes an element unique?
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In what way do heterogeneous mixtures differ from compounds?
In what way do heterogeneous mixtures differ from compounds?
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Why are suspensions classified as heterogeneous mixtures?
Why are suspensions classified as heterogeneous mixtures?
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Study Notes
Types of Matter
- Compounds consist of two or more elements chemically bonded together in fixed proportions.
- Elements are pure substances that cannot be broken down into simpler substances by chemical means.
Mixtures and Suspensions
- Suspensions are heterogeneous mixtures containing large particles that can settle over time.
- Mixtures can be homogeneous (uniform composition) or heterogeneous (distinct, separate components).
Characteristics of Elements
- An accurate statement about elements is that they are the fundamental building blocks of matter, each defined by the number of protons in their nucleus.
- Elements differ from compounds in that compounds are made up of multiple types of atoms, while elements consist of a single type of atom.
Distinguishing Compounds and Mixtures
- A compound is a pure substance with a definite composition, while a heterogeneous mixture does not have uniform composition and consists of different substances in varying proportions.
- A homogeneous mixture has a consistent composition throughout; it is not chemically bonded like a compound.
Differences between Suspensions and Colloids
- Suspensions contain larger particles that may settle out, while colloids have smaller particles that remain dispersed and do not settle.
Defining Characteristics of Substances
- A defining characteristic of a substance is that it has a consistent and uniform composition and properties.
Unique Nature of Elements
- Each element is unique due to its atomic structure, specifically the number of protons, which determines its chemical properties.
Heterogeneous Mixtures vs Compounds
- Heterogeneous mixtures have visibly different substances or phases, while compounds are uniformly composed of their constituent elements.
Behavior of Particles in Mixtures
- Mixtures classified as suspensions have particles that are large enough to eventually settle out when left undisturbed.
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Description
Test your knowledge on distinguishing substances from mixtures, comparing compounds and homogeneous mixtures, identifying elements and compounds, and summarizing properties of solutions, suspensions, and colloids.
