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Ordinary batteries (voltaic cells) for flashlights. radios, and so on, many are Leclanche cells.

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Most Popular

Polyene

A compound that contains more than one double bond per molecule.

Aryl Group

Group of atoms remaining after a hydrogen atom is removed from the aromatic system.

Supersaturated Solution

A solution that contains a higher than saturation concentration of solute, slight disturbance or seeding causes crystallization of excess solute.

S Orbital

A spherically symmetrical atomic orbital, one per energy level.

Percent Composition

The mass percent of each element in a compound.

Formal Charge

A method of counting electrons in a covalently bonded molecule or ion, counts bonding electrons as though they were equally shared between the two atoms.

Evaporation Rate

The rate at which a particular substance will vapourize (evaporate) when compared to the rate of a known substance such as ethyl ether. This term is especially useful for health and fire-hazard considerations.

Central Atom

An atom in a molecule or polyatomic ion that is bonded to more than one other atom.

Film badge

A small patch of photographic film worn on clothing to detect and measure accumulated incident ionizing radiation.

Flotation

Method by which hydrophobic (water-repelling) particles of an ore are separated from hydrophilic (water-attracting) particles of a metallurgical pretreatment process.