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Two or more forms of atoms of the same element with different masses, atoms containing the same number of protons but different numbers of neutrons.

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Degenerate

Of the same energy.

Cohesive Forces

All the forces of attraction among particles of a liquid.

Hydration Energy

The energy change accompanying the hydration of a mole of gase and ions.

Dimer

Molecule formed by combination of two smaller (identical) molecules.

Solvent

The dispersing medium of a solution.

Dispersed Phase

The solute-like species in a colloid.

Two chemistry egg tricks

The French have a saying: "You cannot cook an omelet without breaking eggs."Chemists hearing this proverb totally disagree. There is nothing easier than cleaning an egg without breaking its shell.
Probably our readers have already guessed how to do this, as it’s known that the hard shell of the egg is carbon dioxide, like chalk and marble.

Insoluble Compound

A very slightly soluble compound.

Dissociation Constant

Equilibrium constant that applies to the dissociation of a comples ion into a simple ion and coordinating species (ligands).

Monoprotic Acid

Acid that can form only one hydronium ion per molecule, may be strong or weak. Acid that contains one ionizable hydrogen atom per formula unit.