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24 Cards in this Set
- Front
- Back
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Atom
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The smallest part of an element that retains the properties of that element; they are the building blocks of matter. They have three basic particles: neutrons, protons, and electrons.
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Electron
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A negatively charged particle found in the space around the nucleus of an atom.
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Element
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Matter that is composed of only one kind of atom. It cannot be broken down into any other substance. Found on the Periodic Table.
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Matter
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Anything that has mass and takes up space.
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Molecule
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The smallest unit of a chemical compound that retains the properties of the compound.
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Neutron
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A neutral particle that is part of an atom’s nucleus.
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Nucleus
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The core of an atom, made up of protons and neutrons.
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Proton
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A positively charged particle that is part of an atom’s nucleus.
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Quark
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The elementary particles that make up protons and neutrons.
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Atomic Mass
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The mass of an atom expressed in atomic mass units or amu’s. On the Periodic Table the atomic mass is the average of all of the an atom's isotopes masses.
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Electron Cloud
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A model of the atom where electrons move rapidly in different directions around the nucleus.
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The Strong Force
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The force that binds protons and neutrons together to form the nucleus of an atom.
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Atomic Number
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The number of protons in the nucleus of an atom.
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Valence Electrons
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The electrons that are in the highest energy level of an atom and are involved in chemical bonding. They determine the physical and chemical properties of an element.
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Isotope
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An atom with the same number of protons and a different number of neutrons from other atoms of the same element.
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Matter |
Anything that has mass (kg) and volume (ml). |
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Chemical Change |
A change in matter that produces a new substance. |
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Physical Change |
A change that changes the form or appearance of a substance without changing the substance into something else. |
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Mass |
The amount of matter in an object. Unit of measurement is kg |
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Volume |
How much space an object takes up. Unit of measurement is ml. |
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Physical Property |
A characteristic of a substance that can be observed without changing the substance. |
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Chemical Change |
A characteristic of a substance that cannot be observed without changing the substance. |
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Compound |
A substance made of 2 or more different elements combined in a set ration. |
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Mixture |
Two or more substances that are in same place but chemically combined. |
