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Bonding within metals due to the electrical attraction of positively charges metal ions for mobile electrons that belong to the crystal as a whole.

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  • Creating Malachite egg

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Greenhouse Effect

Trapping of heat at the surface of the earth by carbon dioxide and water vapour in the atmosphere.

Electrophile

Positively charged or electron-deficient.

Aufbau ('building up') Principle

Describes the order in which electrons fill orbitals in atoms.

Differential Thermometer

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

Matter

Anything that has mass and occupies space.

Chemical Hygiene Plan (CHP)

A written program developed and implemented by an employer designating proceedures, equipment, personal protective equipment, and work practices that are capable of protecting employees from the health hazards presented by hazardous chemicals usid in that particular workplace.

Salicylaldehyde

An oily, slightly water-soluble liquid, C7H6O2, having an almondlike odor: used chiefly in perfumery and in the synthesis of coumarin.

Amorphous Solid

A noncrystalline solid with no well-defined ordered structure.

Crystalline Solid

A solid characterized by a regular, ordered arrangement of particles.

Wild patina, is it so bad?

Usually this kind of patina appears on monuments. The most striking example is the Statue of Liberty in New York.