Questions and Answers
What is Chemistry?
What is a chemical?
Any substance that has a defined composition
What does mass measure?
The amount of matter in an object
Define matter.
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What is an atom?
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What is an element?
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What is a compound?
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Define extensive property.
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What is an intensive property?
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What is a physical property?
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Define physical change.
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What is a change of state?
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What is a solid?
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Define liquid.
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What is a gas?
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Define plasma.
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What is a chemical property?
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What is a chemical change?
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Define chemical reaction.
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What are reactants?
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What is a product?
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Define mixture.
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What does homogeneous mean?
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Define solution.
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What does heterogeneous mean?
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Define suspension.
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What is a colloid?
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What is exothermic?
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Define endothermic.
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What is solubility?
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What is qualitative observation?
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Define quantitative observation.
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Study Notes
Chemistry
- The scientific study focused on matter's composition, structure, properties, and changes.
Chemical
- Defined as any substance with a specific composition.
Mass
- Measures the quantity of matter contained in an object.
Matter
- Anything that possesses mass and occupies space.
Atom
- The fundamental unit of an element that retains the element's chemical properties.
Element
- A pure substance that cannot be simplified through chemical methods; characterized by a consistent atomic number.
Compound
- A substance formed from two or more different elements chemically bonded together.
Extensive Property
- A property that varies based on the size or extent of the system being observed.
Intensive Property
- A property that remains constant regardless of the amount of matter, such as pressure, temperature, or density.
Physical Property
- Characteristics of a substance not involving chemical change, examples include density, color, and hardness.
Physical Change
- A transformation of matter that alters its form without changing its chemical properties.
Change of State
- The transition of a substance from one physical state (solid, liquid, gas) to another.
Solid
- Matter characterized by a fixed volume and shape.
Liquid
- Matter with a definite volume but flexible shape.
Gas
- A form of matter lacking a definite volume or shape.
Plasma
- An ionized state of matter formed from gas, containing free-moving ions and electrons.
Chemical Property
- Describes a substance's potential to undergo chemical reactions.
Chemical Change
- A transformation resulting in the formation of new substances with distinct properties.
Chemical Reaction
- A process where one or more substances change to create new substances.
Reactants
- Substances or molecules that engage in chemical reactions.
Product
- New substances generated from a chemical reaction.
Mixture
- A collection of two or more substances that are not chemically bonded.
Homogeneous
- Describes a consistent structure or composition throughout a material.
Solution
- A type of homogeneous mixture where substances are evenly dispersed within a single phase.
Heterogeneous
- Composed of visibly distinct parts or components.
Suspension
- A temporary mixture of two or more substances that appears uniform but separates over time.
Colloid
- A mixture with particles that remain suspended, creating a near-permanent uniform appearance.
Exothermic
- Refers to reactions or compounds that release heat energy during formation.
Endothermic
- Pertains to reactions or compounds that absorb heat energy.
Solubility
- The measure of how much solute can be dissolved in a solvent at a specific temperature.
Qualitative Observation
- Observations based on characteristics that cannot be quantified numerically, relying on sensory input.
Quantitative Observation
- Observations based on measurable quantities or numerical data.
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Description
Test your knowledge of key chemistry concepts with these flashcards from Unit 1: Matter and Change. Each card features important terms and their definitions to help you understand the composition, structure, and properties of matter.