Drexel Chemistry 101 Final Exam Questions (104 Terms) With Verified Definitions Updated 2024

electronegativity {Ans: the tendency of an atom or radical to attract electrons in the formation of an ionic bond}physical change {Ans: A change in a substance that does not involve a change in the identity of the substance}line spectrum {Ans: an emission spectrum with only certain frequencies. It is produced by excited atoms and ions as they fall back to a lower energy level.}wavelength {Ans: The distance between crests of waves, such as those of the electromagnetic spectrum.}pure substance {Ans: A sample of matter, either a single element or a single compound, that has definite chemical and physical properties}cations {Ans: Atoms or group of atoms bound together that have a positive net charge}