WGU C165 Unit 4: Chemistry Questions and Answers Rated A

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WGU C165 Unit 4: Chemistry Questions and Answers Rated A Matter ✔✔Anything that has mass and takes up space Atom ✔✔Smallest particle of an element Proton ✔✔A subatomic particle that ha... s a positive charge and that is found in the nucleus of an atom Neutron ✔✔A subatomic particle that has no charge and that is found in the nucleus of an atom Electron ✔✔A subatomic particle that has a negative charge nucleus ✔✔Center of an atom Electron Cloud ✔✔a region around the nucleus of an atom where electrons are likely to be found Valence Electrons ✔✔electrons in the outermost shell Element ✔✔pure substance that consists entirely of one type of atom Atomic Number ✔✔the number of protons in an atom Atomic Symbol ✔✔A one or two letter abbreviation for an element Compound ✔✔A substance made up of atoms of two or more different elements joined by chemical bonds Chemical Bonds ✔✔An attraction between two atoms resulting from a sharing of outer-shell electrons or the presence of opposite charges on the atoms. The bonded atoms gain complete outer electron shells. Molecules ✔✔Groups of two or more atoms held together by chemical bonds Chemical ✔✔any substance that has a definite composition organic compounds ✔✔carbon-based molecules Pure Substance ✔✔A substance made of only one kind of matter and having definite properties. Mixture ✔✔material composed of two or more elements or compounds that are physically mixed together but not chemically combined Heterogeneous Mixture ✔✔A mixture in which different materials can be distinguished easily Homogeneous Mixture ✔✔A mixture in which substances are evenly distributed throughout the mixture Alloy ✔✔A mixture of two or more metals Solid ✔✔A state of matter that has a definite shape and a definite volume Liquid ✔✔A state of matter that has a definite volume but no definite shape. Gas ✔✔A state of matter with no definite shape or volume Physical change ✔✔a change of matter from one form to another without a change in chemical properties Chemical Change ✔✔A change that occurs when one or more substances change into entirely new substances with different properties. Chemical Reaction ✔✔the process by which one or more substances change to produce one or more different substances Ion ✔✔An atom or group of atoms that h [Show More]

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