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Science Exam

QuestionAnswer
Property Something that can be observed about a substance, such as color, smell, or boiling point.
Atoms The tiny pieces that all matter—all the stuff in the world—is made of.
Substance Something that is made of all the same atoms or groups of atoms.
Product An ending substance that is made during a chemical reaction.
Reactant A starting substance that is part of a chemical reaction.
Chemical Reaction A process in which atoms rearrange to form new substances.
Mendeleev Russian chemist who developed a periodic table of the chemical elements and predicted the discovery of several new elements.
Atomic Number The number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
Atomic Mass The mass of an atom of a chemical element expressed in atomic mass units.
Noble Gases Any of a group of rare gases that include helium, neon, argon, krypton, xenon, and usually radon and that exhibit great stability and extremely low reaction rates.
Metals Any of various opaque, fusible, ductile, and typically lustrous substances that are good conductors of electricity and heat, form cations by loss of electrons, and yield basic oxides and hydroxides.
Non Metals A chemical element (such as boron, carbon, or nitrogen) that lacks the characteristics of a metal.
Metalloids An element intermediate in properties between the typical metals and nonmetals
Created by: cshaw19
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