Examlex
How fast can light travel in one second, if it is moving through a vacuum?
Hydrogen Bonds
An unstable linkage between two molecules due to the electrostatic force acting between a proton in one molecule and an electronegative atom in the other.
Ester
An organic compound made by replacing the hydrogen of an acid by an alkyl or other organic group, often resulting in distinctive fragrances.
Molecules
Molecules are groups of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
Structure
The organization and connections between different parts or elements within a complex structure.
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