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Questions and Answers
What is the definition of a solid?
What is the definition of a solid?
A solid has a definite shape and volume.
What does the term "atomos" mean in Latin?
What does the term "atomos" mean in Latin?
Uncuttable
According to John Dalton, atoms are just tiny solid spheres.
According to John Dalton, atoms are just tiny solid spheres.
True
Molecules are smaller than atoms.
Molecules are smaller than atoms.
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What are the states of matter?
What are the states of matter?
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What is viscosity?
What is viscosity?
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What type of change occurs when heat energy is absorbed by a substance?
What type of change occurs when heat energy is absorbed by a substance?
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Intramolecular forces refer to the attractive forces between molecules.
Intramolecular forces refer to the attractive forces between molecules.
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Molecules are always vibrating.
Molecules are always vibrating.
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What happens to molecules when they are heated?
What happens to molecules when they are heated?
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What is temperature a measurement of?
What is temperature a measurement of?
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Which of the following is NOT a phase change?
Which of the following is NOT a phase change?
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What is sublimation?
What is sublimation?
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What is deposition?
What is deposition?
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What is condensation?
What is condensation?
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What are the smallest particles of matter?
What are the smallest particles of matter?
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Study Notes
States of Matter
- Solids have a definite shape and volume.
- Mass is a measure of how much "stuff" is in an object.
- Volume is the amount of space an object takes up.
History of the Atom
- Leucippus and Democritus were early thinkers about atoms.
- Atoms were originally described as "uncuttable" (meaning indivisible).
- The Latin word for "uncuttable" is "atomos".
- John Dalton proposed the idea that an atom is a tiny solid sphere.
Molecular Theory of Matter
- Molecules are larger than atoms.
- All matter is made of molecules.
- Molecules have spaces between them.
- Molecules are constantly moving.
- Molecules attract one another.
Viscosity
- Viscosity is a measure of a liquid's resistance to flow.
- The stronger the attractions between liquid particles, the higher the viscosity.
Phase Changes
- Phase changes involve a change in energy.
- Endothermic: heat energy is absorbed during a phase change
- Exothermic: heat energy is released during a phase change
Intermolecular Forces
- Intramolecular forces hold atoms together within a molecule.
- Intermolecular forces attract molecules to each other.
Molecular Movement
- Molecules vibrate.
- Molecules in a liquid can transfer between phases.
- The speed of molecules is related to temperature (faster = hotter).
Temperature
- Temperature measures the average kinetic energy of molecules.
- Temperature is one of the factors that determine the state of matter.
Phase Transitions
- Freezing or Solidification: Liquid turns into a solid
- Melting: Solid turns into a liquid.
- Sublimation: Solid turns directly into a gas.
- Deposition: Gas turns directly into a solid.
- Evaporation: Liquid turns into a gas.
- Condensation: Gas turns into a liquid.
Components of Matter
- Matter is made up of tiny particles called atoms.
- Atoms are the fundamental building blocks of matter.
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Description
This quiz explores the fundamental concepts of states of matter, atomic theory, and molecular dynamics. Delve into the characteristics of solids, liquids, and gases, along with the historical development of atomic theory. Test your understanding of important scientific principles such as viscosity and phase changes.
