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Metals of Group IA (Na, K, Rb).

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Alpha (a) Particle

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

Standard Molar Volume

The volume occupied by one mole of an ideal gas under standard conditions, 22.4liters.

D -Transition elements (metals)

B Group elements except IIB in the periodic table, sometimes called simply transition elements EX. Fe, Ni, Cu, Ti .
For further information see Metals.

Galvanizing

Placing a thin layer of zinc on a ferrous material to protect the underlying surface from corrosion.

 

Eluate

Solvent (or mobile phase) which passes through a chromatographic column and removes the sample components from the stationary phase.

Geometrical Isomers

Compounds with different arrangements of groups on either side of a bond with restricted rotation, such as a double bond or a single bond in a ring, for example cis-trans isomers of certain alkenes. Stereoisomers that are not mirror images of each other, also known as position isomers.

Spectrum

Display of component wavelengths (colours) of electromagnetic radiation.

Heterogeneous Catalyst

A catalyst that exists in a different phase (solid, liquid or gas) from the reactants, a contact catalyst.

Chemical Periodicity

The variations in properties of elements with their position in the periodic table.

Polymerization

The combination of many small molecules to form large molecules.