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A region in which the probability of finding an electron is zero.

 

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Activation Energy

Amount of energy that must be absorbed by reactants in their ground states to reach the transition state so that a reaction can occur. In other words, activation energy is the minimum energy required for a chemical reaction to occur.

Clay

A class of silicate and aluminosilicate minerals with sheet-like structures that have enormous surface areas that can absorb large amounts of water.

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.

Reaction Stoichiometry

Description of the quantitative relationships among substances as they participate in chemical reactions.

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.

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.

Limiting Reactant

Substance that stoichiometrically limits the amount of product(s) that can be formed.

Saccharide

An organic compound containing a sugar or sugars.

Bomb Calorimeter

A device used to measure the heat transfer between system and surroundings at constant volume.

Atom

The smallest particle of an element.