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The dispersed (dissolved) phase of a solution.

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Ligand

A Lewis base in a coordination compound.

Background Radiation

Ratiation extraneous to an experiment. Usually the low-level natural radiation form cosmic rays and trace radioactive substances present in our environment.

Vapor

A gas formed by boiling or evaporating a liquid.

Lewis Base

Any species that can make available a share in an electron pair.

Ozone

We breathe 24 hours a day, 7 days a week, consuming about 25 kg of air every day. It turns out that we practically predetermine our health by the air we breathe.

Cyclotron

A device for accelerating charged particles along a spiral path.

Shielding Effect

Electrons in filled sets of s , p orbitals between the nucleus and outer shell electrons shield the outer shell electrons somewhat from the effect of protons in the nucleus, also called screening effect.

Tetrahedral

A term used to describe molecules and polyatomic ions that have one atom in center and four atoms at the corners of a tetrahedron.

Dispersed Phase

The solute-like species in a colloid.

Exothermic

Describes processes that release heat energy.