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Questions and Answers
What is absolute zero?
What is absolute zero?
Which statement about acids is correct?
Which statement about acids is correct?
What does the acid dissociation constant (Kₐ) represent?
What does the acid dissociation constant (Kₐ) represent?
What is activation energy?
What is activation energy?
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Which of the following is a characteristic of alkali metals?
Which of the following is a characteristic of alkali metals?
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What is an activated complex?
What is an activated complex?
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Which of the following best describes an alloy?
Which of the following best describes an alloy?
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What is a defining feature of an alkene?
What is a defining feature of an alkene?
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Which of the following correctly defines adsorption?
Which of the following correctly defines adsorption?
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What is an alpha particle?
What is an alpha particle?
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Study Notes
Chemical Vocabulary
- Absolute Temperature: A temperature reading relative to absolute zero, using the Kelvin unit.
- Absolute Zero: The lowest possible temperature where atomic movement theoretically stops. Bonds still vibrate slightly.
- Accuracy: How close a measured value is to the actual value. A precise measurement can still be inaccurate.
- Acid: A substance releasing H⁺ ions in water, lowering pH below 7. Dissolves metals and turns litmus paper red and phenolphthalein colourless.
- Acid Anhydride: An oxide that forms an acid when added to water (e.g., SO3 forming H2SO4).
- Acid Dissociation Constant (Ka): Ratio of conjugate base and acid concentrations in a weak acid solution at equilibrium. Example: If [conjugate base] = 0.5 M and [acid] = 10 M, Ka = 0.05.
- Activated Complex: A temporary high-energy intermediate in a chemical reaction where reactants join and then separate into products. Also called transition state.
- Activation Energy: Minimum energy needed for a chemical reaction to begin. Can vary greatly depending on the reaction.
- Activity Series: A table of elements ordered by their tendency to react with water and acids.
- Actual Yield: The amount of product actually obtained in a reaction.
- Addition Reaction: A reaction adding atoms to a multiple bond (e.g., carbon-carbon double bond).
- Adsorption: One substance collecting on the surface of another.
- Alcohol: Organic molecule with an -OH group.
- Aldehyde: Organic molecule with a -COH group.
- Alkali Metals: Group 1 elements in the periodic table.
- Alkaline Earth Metals: Group 2 elements in the periodic table.
- Alkane: Organic molecule with only single carbon-carbon bonds.
- Alkene: Organic molecule with at least one carbon-carbon double bond (C=C).
- Alkyne: Organic molecule with at least one carbon-carbon triple bond (C≡C).
- Allotropes: Different forms of an element in the same state (e.g., white phosphorus and red phosphorus).
- Alloy: A mixture of two or more metals (e.g., brass, steel).
- Alpha Particle: A radioactive particle equivalent to a helium nucleus (2 protons, 2 neutrons).
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Description
Test your knowledge of essential chemical vocabulary including terms related to temperature, acids, and chemical reactions. This quiz challenges you to understand the nuances of these fundamental concepts in chemistry.
