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The arrangement of atoms (not lone pairs of electrons) about the central atom of a polyatomic ion.

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Percent by Mass

100% times the actual yield divided by theoretical yield.

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.

Alcohol

Hydrocarbon derivative containing an --OH group attached to a carbon atom not in an aromatic ring. Alcohols are a class of organic compounds containing the hydroxyl group, OH, attached to a carbon atom.

Percent Purity

The percent of a specified compound or element in an impure sample.

Manometer

A two-armed barometer.

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.

Adhesive Forces

Forces of attraction between a liquid and another surface.

Secondary Voltaic Cells

Voltaic cells that can be recharged, original reactanats can be regenerated be reversing the direction of the current flow.

S Orbital

A spherically symmetrical atomic orbital, one per energy level.

Saturated Hydrocarbons

Hydrocarbons that contain only single bonds. They are also called alkanes or paraffin hydrocarbons.