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Questions and Answers
What defines an element?
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?
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?
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?
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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