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The solvent-like phase in a colloid.

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Thermal Cracking

Decomposition by heating a substance in the presence of a catalyst and in the absence of air.

 

Conformations

Structures of a compound that differ by the extent of rotation about a single bond.

Moderator

A substance such as hydrogen, deuterium, oxygen or paraffin capable of slowing fast nuetrons upon collision.

Strong Electrolyte

A substance that conducts electricity well in a dilute aqueous solution.

 

Ternary Compound

A compound consisting of three elements, may be ionic or covalent.

yttrium metal

Any of a subgroup of rare-earth elements, of which the cerium and terbium metals comprise the other two subgroups.

Net Ionic Equation

Equation that results from canceling spectator ions and eliminating brackets from a total ionic equation.

Sigma Bonds

Bonds resulting from the head-on overlap of atomic orbitals, in which the region of electron sharing is along and (cylindrically) symmetrical to the imaginary line connecting the bonded atoms.

History of fireworks

There is an assumption that the history of fireworks started in China, about 2000 years ago. It is possible that the Chinese accidentally discovered explosions by burning bamboo canes.

Copper

Discovered : known to ancient civilisations
Origin : The name is derived from 'Cuprum', the Latin name for Cyprus.