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The attractive forces that hold atoms together in elements or compounds.

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Binding Energy (nuclear binding energy)

The energy equivalent (E = mc^2) of the mass deficiency of an atom.  where: E = is the energy in joules, m is the mass in kilograms, and c is the speed of light in m/s^2

Anion

A negative ion, an atom or goup of atoms that has gained one or more electrons.

 

Differential Thermometer

A thermometer used for accurate measurement of very small changes in temperature.

20 interesting chemistry facts

20 interesting chemistry facts.

Excited State

Any state other than the ground state of an atom or molecule.

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.

Delocalization

Of electrons, refers to bonding electrons that are distributed among more than two atoms that are bonded together, occurs in species that exhibit resonance.
The formation of a set of molecular orbitals that extend over more than two atoms, important in species that valence bond theory describes in terms of resonance.

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Carcinogen

A substance capable of causing or producing cancer in mammals.

 

Nickel-cadmium cell (Nicad battery)

A dry cell in which the anode is Cd, the cathode is NiO2, and the electrolyte is basic.