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Pure Substances and Mixtures

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Questions and Answers

What defines an element?

Its fixed composition and distinct properties

Its classification as a compound

Its ability to be chemically combined with other elements

Its position in the Periodic Table of Elements (correct)

What characterizes a homogeneous mixture?

It does not have a fixed uniform and the separate substances can be seen

It has a fixed uniform and the separate substances cannot be seen (correct)

It is a combination of two or more compounds

It is classified by its atomic number

What is the defining feature of a compound?

It has a fixed composition and distinct properties

It is defined by its atomic number

It contains more than one element chemically combined (correct)

It is classified in the Periodic Table of Elements

What distinguishes a pure substance from a mixture?

<p>A pure substance has a fixed composition, while a mixture contains two or more substances</p> Signup and view all the answers

Study Notes

Definitions of Substances

An element is a substance that consists of only one type of atom, which cannot be broken down into simpler substances by chemical means.
A homogeneous mixture, also known as a solution, is a mixture that has a uniform composition throughout, where the particles are evenly distributed.
A compound is a substance formed by the chemical combination of two or more different elements, where the atoms of each element are chemically bonded.
A pure substance is a substance that has a fixed composition, which can be either an element or a compound, whereas a mixture is a combination of two or more substances, where each substance maintains its chemical properties.

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Description

Test your knowledge of pure substances and mixtures with this quiz. Explore the characteristics of elements and compounds, and learn about the classification of substances in the periodic table. Understand the differences between pure substances and mixtures. Learn the classifications of mixture.