Exam: IELTS

Definition: A type of fat molecule that contains phosphorus and is an important part of cell membranes in living organisms.

Example: Phospholipids are essential for creating the structure of cell membranes.

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 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 or containing phosphorus, particularly in a form that has a lower valence than certain other phosphorus compounds.

Example: The phosphorous compounds are essential for plant growth.

Definition: A chemical element that is highly reactive and poisonous, found in nature mainly in phosphates. It is important for life and is used in various products like fertilizers and safety matches.

Example: Phosphorus is essential for plant growth and is commonly used in fertilizers.