What type of spectrum is produced when electromagnetic radiation is emitted or absorbed as electrons change energy levels in an atom?

What is the polyatamic ion of borate

Aglow stick contains a glass vial with chemicals. when the glow stick is bent, the vial breaks and the chemicals react to produce a glow. a science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. what conclusion can be drawn based on the observation? be sure to note the outcome and test variables in the conclusion.

The sum of the oxidation numbers in a neutral compound is always