Questions and Answers
What defines an element?
Its position in the Periodic Table of Elements
What characterizes a homogeneous mixture?
It has a fixed uniform and the separate substances cannot be seen
What is the defining feature of a compound?
It contains more than one element chemically combined
What distinguishes a pure substance from a mixture?
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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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