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of or derived from saccharin or a saccharine substance.

 

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Spectator Ions

Ions in a solution that do not participate in a chemical reaction.

Conformations

Structures of a compound that differ by the extent of rotation about a single bond.

Hydrometer

A device used to measure the densities of liquids and solutions.

Noble Gases (Rare Gases)

Elements of the periodic Group 0, also called rare gases, formerly called inert gases, He,Ne,Ar, Kr, Xe, Rn.

Cis-Trans Isomerism

A type of geometrical isomerism related to the angles between like ligands.

Mass Number

The sum of the numbers of protons and neutrons in an atom, an integer.

Ligand

A Lewis base in a coordination compound.

Zinc

Discovered: known in India and China before 1500 and to the Greeks and Romans before 20 BC as the copper-zinc alloy brass
Origin: The name is derived from the German ‘Zink’.
Atomic no: 30
Mass No: 65
Description: A grey metal with a blue tinge. World production exceeds 7 million tons a year, and it is used to galvanise iron to prevent it rusting. It is also employed in alloys and batteries, and as zinc oxide to stabilise rubber and plastics. Zinc is essential for all living things, and is important for growth and development. The average human body contains about 2.5 grams and takes in about 15 milligrams per day. Some foods have above average levels of zinc, including herring, beef, lamb, sunflower seeds and cheese.

Heterogeneous Equilibria

Equilibria involving species in more than one phase.

Born-Haber Cycle

A series of reactions (and accompanying enthalpy changes) which, when summed, represents the hypothetical one-step reaction by which elements in their standard states are converted into crystals of ionic compounds (and the accompanying enthalpy changes.)