Examlex
One of the principal difficulties in establishing the theory of continental drift (the idea that tectonic plates drift around on Earth's surface) was identifying a source of energy capable of powering such movement. What is now believed to be the source of such energy?
Molecular Formula
A way of expressing information about the atoms that constitute a particular chemical compound, using symbols for the elements and numerical subscripts indicating the number of atoms involved.
Carbon-Carbon Double Bond
A chemical bond between two carbon atoms involving four bonding electrons, the basis of alkenes' structure and reactivity.
Geometry
The branch of mathematics concerning the properties and relations of points, lines, surfaces, solids, and higher dimensional analogs.
Alkene
Unsaturated hydrocarbons with at least one double bond between carbon atoms, exhibiting properties like addition reactions.
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