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At constant temperature the volume occupied by a definite mass of a gas is inversely proportional to the applied pressure.

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DP number

The degree of polymerization, the average number of monomer units per polymer unit.

Safranine

Also called "phenosafranine". A purplish-red, water-soluble dye, C18H14N4, used for textiles and as a stain in microscopy.

Crystal Lattice Energy

Amount of energy that holds a crystal together, the energy change when a mole of solid is formed from its constituent molecules or ions (for ionic compounds) in their gaseous state.

Turning iron nail into copper nail

This simple chemical experiment shows the so-called process of copper plating of metal products. Copper has the ability to deposit on a metal surface.

Allotropic Modifications (Allotropes)

Different forms of the same element in the same physical state.

Mechanism

The sequence of steps by which reactants are converted into products.

How to make crystal glass

From history we know that the idea of creating crystal belongs to the British: they were the first to add lead oxides to the charge material, and as a result got glass with unusual “voice”, transparency and sparkling faces. Classical crystal contains 24% of lead oxide, but there are products with a higher content of up to 30%.

Chain Termination Step

The combination of two radicals, which removes the reactive species that propagate the change reaction.

Alpha (a) Particle

Helium ion with 2+ charge, an assembly of two protons and two neutrons.

Mass

A measure of the amount of matter in an object. Mass is usually measured in grams or kilograms.