The spectrum of an atom consists of a continuous set of wavelengths which are emitted or absorbed by the atom. consists of an infinite number of wavelengths that can be emitted or absorbed by the atom. can only be explained by quantum mechanics, which states that electrons may only orbit nuclei in discrete orbits. is fully explained by 19th century physics.

Different isotopes indicate that an element will have different numbers of

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

Newtons second law deals most cosely with