Term
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Definition
Key Terms:
Atom Electron Nucleus Proton
Energy Level Neutron Atomic Number
Isotope Mass Number |
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Term
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Definition
| Is the smallest part of an element. |
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Term
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Definition
| A negatively charged particle that is found outside the nucleus of an atom. |
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Term
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Definition
| The central core of an atom;the solid inner core of a comet. |
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Term
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Definition
| A positively charged particle that is part of an atom's nucleus. |
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Term
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Definition
| The specific amount of energy an electron has. |
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Term
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Definition
| A small particle in the nuclues of the atom, with no electrical charge. |
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Term
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Definition
| The number of protons in the nucleus of an atom. (Atomic________) |
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Term
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Definition
| 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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Term
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Definition
| The sum of protons and neutrons in the nucleus of an atom. |
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Term
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Definition
Key Words:
Atomic Mass Periodic Table Period
Group Chemical Symbol |
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Term
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Definition
| The average mass of all the isotopes of an element. |
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Term
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Definition
| A chart of the elements showing the repeating pattern of their properties. |
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Term
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Definition
| A horizontal row of elements in the periodic table. |
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Term
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Definition
| Elements in the same vertical column of the periodic table; also called a family. |
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Term
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Definition
| A one- or two-letter representation of an element. |
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Term
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Definition
Key Words:
Metal Malleable Ductile Thermal Conductivity
Electrical Conductivity Reactivity
Corrosion Alkali Metal
Alkaline Earth Metal Transition Metal
Particle Accelerator |
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Term
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Definition
| A class of elements characterized by physical properties that include shininess, malleability, ductility, and conductivity. |
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Term
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Definition
| A term used to describe material that can be pounded into shapes. |
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Term
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Definition
| A term used to describe a material that can be pulled out into a long wire. |
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Term
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Definition
| The ability of an object to transfer heat. |
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Term
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Definition
| The ability of an object to transfer electric current. |
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Term
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Definition
| The ease and speed with which an element combines, or reacts, with other elements and compounds. |
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Term
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Definition
| The gradual wearing away of a metal element due to a chemical reaction. |
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Term
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Definition
| An element in Group 1 of the periodic table. |
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Term
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Definition
| An element in Group 2 of the periodic table. |
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Term
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Definition
| One of the elements in Groups 3 through 12 of the periodic table. |
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Term
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Definition
| A machine that moves atomic nuclei at higher and higher speeds until they crash into one another, sometimes forming heavier elements. |
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Term
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Definition
Key Words:
Nonmetal Diatomic Molecule Halogen
Inert Gas Semimetal Semiconductor |
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Term
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Definition
| An element that lacks most of the properties of a metal. |
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Term
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Definition
| A molecule consisting of two atoms. |
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Term
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Definition
| An element found in Group 17 of the periodic table. |
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Term
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Definition
| An element found in Group 18 of the periodic table. |
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Term
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Definition
| An element that has some characteristics of both metals and nonmetals. (One___) |
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Term
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Definition
| A material that conducts current under certain conditions. (One___) |
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Term
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Definition
Key Words:
Radioactive Decay Radioactivity
Alpha Particle Beta Particle
Gamma Radiation Tracer |
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Term
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Definition
| The process in which the atomic nuclei of unstable isotopes release fast-moving particles and energy. |
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Term
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Definition
| The ability of a substance to spontaneously emit radiation; a property of unstable isotopes. |
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Term
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Definition
| A type of nuclear radiation consisting of two protons and two neutrons. |
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Term
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Definition
| A fast-moving electron that is given off as nuclear radiation. |
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Term
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Definition
| A type of nuclear radiation made of high-energy waves. |
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Term
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Definition
| A radioactive isotope that can be followed through the steps of a chemical reaction or industrial process. |
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