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Questions and Answers
Which of the following is NOT a property of matter?
Which of the following is NOT a property of matter?
What is the state of matter where particles are widely spaced and can move freely?
What is the state of matter where particles are widely spaced and can move freely?
What is an example of a physical change?
What is an example of a physical change?
What is a mixture?
What is a mixture?
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What is the purpose of the particle theory?
What is the purpose of the particle theory?
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What is the term for the mass per unit volume of a substance?
What is the term for the mass per unit volume of a substance?
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Study Notes
Atomic Structure
- Atoms are the building blocks of matter
- Consist of:
- Protons (positive charge) in the nucleus (center)
- Neutrons (no charge) in the nucleus
- Electrons (negative charge) orbiting the nucleus
Properties of Matter
- Mass: a measure of the amount of matter in an object
- Volume: the amount of space occupied by an object
- Density: mass per unit volume of a substance
States of Matter
- Solid: particles are closely packed and have a fixed shape and volume
- Liquid: particles are close together but can move past each other, taking the shape of their container
- Gas: particles are widely spaced and can move freely, expanding to fill their container
- Plasma: high-energy state where atoms are ionized, often found in stars and lightning
Physical and Chemical Changes
- Physical Change: a change in the state of matter, but not in its chemical composition (e.g., melting ice)
- Chemical Change: a change in the chemical composition of a substance, resulting in a new substance (e.g., rusting iron)
Mixtures and Substances
- Mixture: a physical combination of two or more substances, where each maintains its chemical properties
- Substance: a pure form of matter with a fixed chemical composition (e.g., water, iron)
Particle Theory
- Matter is composed of tiny particles called atoms and molecules
- Particles are in constant motion, with kinetic energy increasing with temperature
- Particles have space between them, even in solids
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Description
Test your understanding of fundamental chemistry concepts, including atomic structure, properties of matter, states of matter, and more. Review the basics of chemistry and get ready to ace your next exam!
