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Questions and Answers
What is the basic unit of matter?
What is the basic unit of matter?
- Atom (correct)
- Solid
- Molecule
- Element
What do we call two or more atoms joined by chemical bonds?
What do we call two or more atoms joined by chemical bonds?
Molecule
A gas is a substance in which the particles are packed together and do not move much.
A gas is a substance in which the particles are packed together and do not move much.
False (B)
A substance in which particles are close together and in contact but move past each other is called a ___.
A substance in which particles are close together and in contact but move past each other is called a ___.
What is kinetic energy?
What is kinetic energy?
What is density?
What is density?
A pure substance consists of just one type of particle and is the same throughout.
A pure substance consists of just one type of particle and is the same throughout.
Which of the following is a mixture made of substances so evenly mixed that it is difficult to see the individual substances?
Which of the following is a mixture made of substances so evenly mixed that it is difficult to see the individual substances?
What is the term for a special group of metals that is more difficult and expensive to extract?
What is the term for a special group of metals that is more difficult and expensive to extract?
What is luster?
What is luster?
Ability to be easily hammered and shaped is known as ___.
Ability to be easily hammered and shaped is known as ___.
Which chart organizes all known elements according to patterns in their properties?
Which chart organizes all known elements according to patterns in their properties?
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Study Notes
Basic Units of Matter
- Atom: The basic unit of matter.
- Molecule: Two or more atoms joined by chemical bonds.
States of Matter
- Solid: Particles are packed together and don't move much.
- Liquid: Particles are close together and in contact, but can move past each other.
- Gas: Particles are far apart and don't stay in contact with each other.
Key Properties of Matter
- Kinetic Energy: The energy of motion.
- Density: The amount of mass in a given amount of space, measured in a unit of mass per unit volume.
Classifications of Matter
- Pure Substance: Consists of just one type of particle and is the same throughout.
- Homogeneous Mixture: Substances are evenly mixed so it is difficult or impossible to see the individual substances.
- Heterogeneous Mixture: Mixture made of parts that are easily identified and can be separated.
- Element: A substance that contains only one type of atom and cannot be broken down into a simpler form.
Elements and the Periodic Table
- Periodic Table: A chart that organizes all known elements according to patterns in their properties.
- Metal: An element that is a good conductor of heat and electricity.
- Luster: Shininess.
- Malleability: Ability to be easily hammered and shaped.
- Rare Earth Metal: A special group of metals that is more difficult and expensive to extract.
- Nonmetal: An element that is a poor conductor of heat and electricity.
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