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Elements and the Periodic Table
Introduction to Atoms Organizing the Elements Metals Nonmetals and Metalloids Radioactive Elements
Terms in this set (38)
The basic particle from which all elements are made.
A negatively charged particle that is found outside the nucleus of an atom.
The central core of the atom, containing protons and usually neutrons.
A positively charged particle that is part of an atom's nucleus.
A region of an atom in which electrons of the same energy are likely to be found.
A small particle in the nucleus of the atom, with no electrical charge.
The number of protons in the nucleus of an atom.
An atom with the same number of protons and a different number of neutrons from other atoms of the same element.
The sum of protons and neutrons in the nucleus of an atom.
The average mass of all the isotopes of an element.
A chart of the elements showing the repeating pattern of their properties.
A horizontal row of elements in the periodic table.
Elements in the same vertical column of the periodic table; also called a family.
A one or two-letter representation of an element.
A gas-like state of matter consisting of a mixture of free electrons and atoms that are stripped of their electrons.
The process in which two atomic nuclei combine to form a larger nucleus, forming a heavier element and releasing huge amounts of energy.
A class of elements characterized by physical properties that include shininess, malleability, ductility, and conductivity.
A term used to describe material that can be pounded into shapes.
A term used to describe a material that can be pulled out into a long wire.
The ability of an object to transfer heat or electricity to another object.
The ease and speed with which an element combines, or reacts, with other elements and compounds.
The gradual wearing away of a metal element due to a chemical reaction.
An element in Group 1 of the periodic table
alkaline earth metal
An element in Group 2 of the periodic table.
One of the elements in Groups 3 through 12 of the periodic table.
A machine that moves atomic nuclei at higher and higher speeds until they crash into one another, sometimes forming heavier elements.
An element that lacks most of the properties of a metal.
A molecule consisting of two atoms.
An element found in Group 17 of the periodic table.
An element in Group 18 of the periodic table.
An element that has some characteristics of both metals and nonmetals.
A material that conducts current under certain conditions.
The process in which the atomic nuclei of unstable isotopes release fast-moving particles and energy.
The spontaneous emission of radiation by an unstable atomic nucleus.
A type of nuclear radiation consisting of two protons and two neutrons.
A fast-moving electron that is given off as nuclear radiation.
A type of nuclear radiation made of high-energy waves.
A radioactive isotope that can be followed through the steps of a chemical reaction or industrial process.
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