Examlex
What is the Pauli exclusion principle? Explain.
Radioactivity
The process by which atoms emit energy in the form of particles or electromagnetic waves due to the decay of their unstable nuclei.
Phosphorescence
A type of photoluminescence related to fluorescence, but in which a material emits light for a longer period after the initial excitation energy is supplied.
Chemiluminescence
The emission of light (luminescence) as a result of a chemical reaction without the need for external light sources.
Mineral Sample
A physical piece of a naturally occurring solid substance with a defined chemical composition and crystalline structure.
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