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The concept in which two or more equivalent dot formulas for the same arrangement of atoms (resonance structures) are necessary to describe the bonding in a molecule or ion.

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Hydrocarbons

Compounds that contain only carbon and hydrogen.

Supercritical Fluid

A substance at temperature above its critical temperature.

Equilibrium or Chemical Equilibrium

A state of dynamic balance in which the rates of forward and reverse reactions are equal, the state of a system when neither forward or reverse reaction is thermodynamically favored.

Gem-dimethyl group

Two methyl groups of the same carbon atom.

Electrodes

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

A brief history of dyeing fabrics

 Dyeing fabrics is giving the fibers a homogeneous color that has a certain degree of strength. The methods of dyeing are very diverse, depending on the properties of the dyes and the dyed fibers.

Graham's Law

The rates of effusion of gases are inversely proportional to the square roots of their molecular weights or densities.

How is colored crystal made?

However, not everyone knows that in addition to the traditional transparent, there is still an unusually beautiful and spectacular colored crystal, which is obtained through the addition of various metal oxides into the glass. They give the crystal unusually noble shades of red, purple, blue, green and pink colors.

Aufbau ('building up') Principle

Describes the order in which electrons fill orbitals in atoms.

Kinetic Energy

Energy that matter processes by virtue of its motion.