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Details Title: Matter Description: Vocabulary Total Flash Cards: 17 Created: 09/13/2004 16:24:11	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term Matter Definition "Anything that has mass and takes up space and is made up of different kinds of atoms; includes all things that can be seen, tasted, smelled, or touched but does not include heat, sound, or light" Term Atom Definition "A very small particle that makes up most kinds of matter and consists of smaller parts called protons, neutrons, and electrons." Term Conservation of Matter Definition States that matter is not created or destroyed but only changes its form. Term Electron Definition "Invisible, negatively charged particle located in a cloudlike formation that surrounds the nucleus of an atom." Term Nucleus Definition "Positively charged, central part of an atom." Term Proton Definition Positively charged particle located in the nucleus of an atom and that is counted to identify the atomic number. Term Neutron Definition An uncharged particle located in the nucleus of an atom. Neutral or no charge. Term Electron Cloud Definition A spherical cloud of varying density surrounding the nucleus. The varying density shows where an electron is more or less likely to be. Atoms with electrons in higher energy levels have additional electron clouds of different shapes that also show where those electrons are likely to be. Term Quarks Definition Smaller parts of protons and neutrons. Term Element Definition "Natural or synthetic material that cannot be broken down into simpler materials by ordinary means; has unique properties and is generally classified as a metal, metalloid, or nonmetal." Term Atomic Number Definition Number of protons in the nucleus of each atom of a given element; the top number in the periodic table. Term Isotope Definition Two or more atoms of the same element that have different numbers of neutrons in their nuclei. Term mass number Definition Sum of the number of protons and neutrons in the nucleus of an atom. Term Atomic mass Definition "Average mass of an atom of an element; its unit of measure is the atomic mass unit (u), which is 1/12 the mass of a carbon-12 atom." Term Metal Definition "Element that is malleable, ductile, a good conductor of electricity, and generally has a shiny or metallic luster." Term Nonmetal Definition Elements that are usually gases or brittle solids and poor conductors of electricity and heat; are the basis of the chemicals of life. Term Metalloid Definition Element that has characteristics of both metals and nonmetals and is a solid at room temperature.