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Complex in which the metal is in the center of a square plane, with ligand donor atoms at each of the four corners.

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Absolute Zero

The zero point on the absolute temperature scale, -273.15°C or 0 K, theoretically, the temperature at which molecular motion ceases. The concept of an absolute zero temperature was first deduced from experiments with gases. When a fixed volume of gas is cooled, its pressure decreases with its temperature. Absolute zero physically possesses quantum mechanical zero-point energy.

Nuclear Reactor

A system in which controlled nuclear fisson reactions generate heat energy on a large scale, which is subsequently converted into electrical energy.

Supercooled Liquids

Liquids that, when cooled, apparently solidify but actually continue to flow very slowly under the influence of gravity e.g glass.

Electrodes

Surfaces upon which oxidation and reduction half-reactions, occur in electrochemical cells.

Supersaturated Solution

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

Daughter Nuclide

Nuclide that is produced in a nuclear decay.

 

Bubbles

Have you ever noticed that soap bubbles go up in winter and fall down in summer? The reason is that warm air is lighter than cold. And in winter the difference between the air temperature in the room (especially near the windows) and the one you exhale into the bubble is enough to overcome the heaviness of its shell.

Pairing

A favourable interaction of two electrons with opposite m , values in the same orbital.

Disproportionation Reactions

Redox reactions in which the oxidizing agent and the reducing agent are the same species.

Electronegativity

A measure of the relative tendency of an atom to attract electrons to itself when chemically combined with another atom.