Questions and Answers
Can a particle be a single atom?
True
Can a particle be a molecule?
True
Define: particle
A singular atom or atoms bonded together which function as a unit.
What do subscripts represent?
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Is R a pure substance or a mixture?
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Is Sq2 & R a pure substance or a mixture?
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Is T & RSq & R a pure substance or a mixture?
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Is TSq2R a pure substance or a mixture?
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Do pure substances have a space or '&' between the letters?
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Do mixtures have an '&' between letters?
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Is SqR3 an element or compound?
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Is RSq an element or compound?
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Is Sq2 an element or compound?
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Is T an element or compound?
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How are the codes for elements different from those for compounds?
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Is Br2 an element, compound, or mixture?
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Is NaHCO3 an element, compound, or mixture?
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Is C6H12O6 & H2O an element, compound, or mixture?
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Is Cu & Zn an element, compound, or mixture?
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Is CO2 an element, compound, or mixture?
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Is Al an element, compound, or mixture?
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What is the difference between an atom and an element?
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What is the difference between a molecule and compound?
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Is straining cooked pasta from water a physical or chemical separation?
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Is using a fuel cell to separate water into hydrogen and oxygen a physical or chemical separation?
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______ can be separated by physical means.
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______ need to be separated by chemical means.
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Particle drawing for an element:
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Study Notes
Classification of Matter
- A particle can be a single atom or a molecule, functioning as a unit.
- Definition of particle: singular atom or bonded atoms.
Subscripts and Molecules
- Subscripts indicate the number of specific atoms in a molecule.
Pure Substances vs. Mixtures
- Pure substances do not have spaces or "&" between letters.
- Mixtures contain an "&" between letters.
- Examples indicate that "Sq2 & R" and "T & RSq & R" are mixtures.
- "TSq2R" is identified as a pure substance.
Elements and Compounds
- Compounds are identified by codes containing multiple elements (e.g., "SqR3", "RSq").
- Elements are represented with a single capital letter (e.g., "Sq2", "T", "Br2", "Al").
- Molecules consist of two or more atoms; compounds contain at least two different elements.
Physical vs. Chemical Separation
- Straining pasta is a physical separation.
- Using a fuel cell to separate water into hydrogen and oxygen is a chemical separation.
Separation Methods
- Mixtures can be separated by physical means, while compounds require chemical separation.
Differences Between Atoms, Elements, and Molecules
- An element consists of one type of atom, whereas a molecule is formed by two or more atoms joined together.
- The distinction between a molecule and a compound is that a compound is a molecule containing at least two different elements.
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Description
Test your knowledge on the classification of matter with these informative flashcards. Each card delves into essential definitions and concepts such as particles, pure substances, and mixtures. Perfect for students looking to solidify their understanding of matter in chemistry.
