Test Bank For Chemistry By Jason Overby Exam with correct Answers
Chemistry Exam Test Bank by Jason Overby | A+ Rated Study Resource Matter - answer - anything that takes up space (volume) and has mass. Atom - answer - the smallest particle of matter. Mass - answer - a measurement of the amount of matter an object contains. Volume - answer - a measurement of the amount of (3-dimensional) space an object takes up. Chemistry - answer - The study of the materials that make up the universe (matter) and the changes these materials undergo. Element - answer - any of the more than 118 known pure substances that cannot be separated into simpler forms. Periodic Table of Elements - answer - created by Dmitri Mendeleev in 1869, a chart of all the known elements in order of increasing atomic number, organized in groups according to their properties. Properties - answer - characteristics of a substance that never changes and can be used to identify the substance. E.g.: melting point, density, hardness, etc. Physical Change - answer - A change that alters the appearance of a substance, but does not create a new substance. Chemical Change - answer - A change that results in the formation of a new substance Metals - answer - one of the three groups of elements that share properties such as high luster (shiny), good conductors of heat energy and electricity, high melting points, and usually bend without breaking (malleable). Nonmetals - answer - one of the three groups of elements that share properties such as low luster (dull), bad conductors of heat and electricity, low melting points, and are brittle (crumble) when solid. Metalloids - answer - also called semi-metals, one of the three groups of elements that share properties of both metals and nonmetals. Compound - answer - a substance made of two or more different elements. Molecule - answer - The smallest particle of a substance, made up of one or more atoms. Ex. H2O, NaCl, H2O2
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