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22 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Atom
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the smallest particle of a substance that can exist by itself or be combined with other atoms to form a molecule
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The atom is the smallest unit that defines the chemical elements and their isotopes
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Atomic Mass
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the mass of an atom usually expressed in atomic mass units
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Atomic mass is the average weight of atoms of an element.
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Atomic Mass Unit
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a unit of mass for expressing masses of atoms, molecules, or nuclear particles equal to 1⁄12 the mass of a single atom of the most abundant carbon isotope 12C
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The standard unit that is used for indicating mass on an atomic or molecular scale.
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Atomic Number
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an experimentally determined number characteristic of a chemical element that represents the number of protons in the nucleus which in a neutral atom equals the number of electrons outside the nucleus and that determines the place of the element in the periodic table
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The number of protons found in the nucleus of an atom of an element.
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Atomic Symbol
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The atom of each element is made up of electrons, protons and neutrons.
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Atomic symbol is code for the name of a chemical element.
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Chemical Symbol
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Chemical symbol is code for a chemical element.
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An abbreviation of a chemical element on the periodic table
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Electron
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a very small particle of matter that has a negative charge of electricity and that
travels around the nucleus of an atom |
The electron is a subatomic particle with a negative charge
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Group
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A column of elements on the periodic table. There are 18 numbered groups
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One group on the periodic table would be N, P, As, Sb, Bi
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Isotopes
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any one of various forms in which the atoms of a chemical element can occur
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Isotopes are atoms of elements with different number of neutrons
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Mass Number
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an integer that approximates the mass of an isotope and designates the number of nucleons in the nucleus
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The totally number of protons and neutrons in an element
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Metal
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A substance (such as gold, tin, or copper) that usually has a shiny appearance, is a good conductor of electricity and heat, can be melted, and is usually capable of being shaped
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Metal is good at forming bonds with non-metals
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Metalloid
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a chemical element that has properties in between, or is a mixture of, those of metals and nonmetals
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They have both metal and non-metal properties
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Neutron
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A very small particle of matter that has no electrical charge and is part of the nucleus of all atoms except hydrogen atoms
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These have no charge
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Nonmetal
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In chemistry, a nonmetal (or non-metal) is a chemical element that mostly lacks metallic attributes.
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Substance that does not exhibit any metal characteristics. Example, oxygen
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Nucleus
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the central part of an atom that is made up of protons and neutrons
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The center and core of the atom is the nucleus
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Period
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A horizontal row of elements on the periodic table.
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Elements of the same period have the same number of electron shells
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Proton
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a very small particle of matter that is part of the nucleus of an atom and that has a positive electrical charge
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In the nucleus of the atom, has a positive charge.
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Subatomic Particle
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A subatomic particle is a particle smaller than an atom: it may be elementary or composite
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Particle physics and nuclear physics concern themselves with the study of subatomic particles, their interactions, and matter made up of them which do not aggregate into atoms.
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Nucleus
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the central part of an atom that is made up of protons and neutrons
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The center and core of the atom is the nucleus
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Period
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A horizontal row of elements on the periodic table.
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Elements of the same period have the same number of electron shells
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Proton
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a very small particle of matter that is part of the nucleus of an atom and that has a positive electrical charge
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In the nucleus of the atom, has a positive charge.
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Subatomic Particle
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A subatomic particle is a particle smaller than an atom: it may be elementary or composite
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Particle physics and nuclear physics concern themselves with the study of subatomic particles, their interactions, and matter made up of them which do not aggregate into atoms.
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