Exam: GRE (Verbal)

Definition: A type of chemical compound that contains phosphorus and behaves like a positively charged ion, similar to ammonium.

Example: Phosphonium compounds are often used in organic chemistry as intermediates in various reactions.

Definition: A type of protein that has phosphoric acid attached to it, which can affect its function and properties.

Example: Casein is a well-known phosphoprotein found in milk.

Definition: A material that can store energy and emit light when it is exposed to radiation, commonly used in lighting and display technologies.

Example: The screen of the television uses a phosphor to create bright colors.

Definition: To continue to give off light after being exposed to a light source, without producing heat or fire.

Example: Some materials can phosphoresce, glowing in the dark after being charged by light.

Definition: The release of light by a substance after it has absorbed energy, which continues for a period of time even after the energy source is removed.

Example: The phosphorescence of the glow-in-the-dark stars on the ceiling amazed the children.

Definition: Describing a material that can give off light for a while after being charged or exposed to light, even when the light source is removed.

Example: The phosphorescent paint glowed in the dark after being exposed to sunlight.

Definition: A material that can absorb light and then emit it slowly over time, often glowing in the dark after being exposed to light.

Example: The phosphorescent paint glowed in the dark after being charged by sunlight.

Definition: Relating to or containing phosphorus, particularly in a higher oxidation state than in certain other phosphorus compounds.

Example: Phosphoric acid is commonly used in fertilizers and food products.

Definition: A type of sedimentary rock that is mainly made up of phosphate minerals, especially apatite.

Example: Phosphorite is an important source of phosphorus for fertilizers.

Definition: Relating to a type of sedimentary rock that contains a high percentage of phosphate minerals, often used as a fertilizer.

Example: The phosphoritic layers in the rock formation indicate a rich source of phosphorus.

Definition: A type of chemical reaction where a bond is broken by the action of phosphoric acid or phosphate, similar to hydrolysis.

Example: Phosphorolysis is an important process in biochemistry, especially in the breakdown of certain carbohydrates.