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An isotope of hydrogen whose atoms are twice as massive as ordinary hydrogen,deuterion atoms contain both a proton and a neutron in the nucleus.

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Silicones

Polymeric organosilicon compounds, contain individual or cross-linked Si-O chains or rings in which some oxygens of SiO4 tetrahedra are replaced by other groups.

Electromagnetic Radiation

Energy that is propagated by means of electric and magnetic fields that oscillate in directions perpendicular to the direction of travel of the energy.

Conjugated Double Bonds

Double bonds that are separated from each other by one single bond -C=C-C=C-.

Nuclear Reaction

Involves a change in the composition of a nucleus and can evolve or absorb an extraordinarily large amount of energy.

Three ways to make patina at home

The first way is ammonia patination. To do this, take a plastic container. Put a couple of paper or ordinary towels at the bottom. Moisten them with ammonia. Then sprinkle with large table salt.

Alkynes

Unsaturated hydrocarbons that contain one or more carbon-carbon triple bonds.

Homogeneous Equilibria

Equilibria involving only one species in a single phase. For example, all gases, all liquids or all solids.

Band

A series of very closely spaced, nearly continuous molecular orbitals that belong to the crystal as a whole.

Carbonium ion

An orgainic ion carrying a positive charge on a carbon atom.

Electronic Transition

The transfer of an electron from one energy level to another.