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Nuclide that undergoes nuclear decay.

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First Law of Thermodynamics

The total amount of energy in the universe is constant (also known as the Law of Conservation of Energy) energy is neither created nor destroyed in ordinary chemical reactions and physical changes.

Overlap

The interaction of orbitals on different atoms in the same region of space.

Catalyst

A substance that speeds up a chemical reaction without being consumed itself in the reaction.
A substance that alters (usually increases) the rate at which a reaction occurs.

Evaporization

Vaporization of a liquid below its boiling point.

Gem-dimethyl group

Two methyl groups of the same carbon atom.

Hydration

Reaction of a substance with water.

Electrochemistry

Study of chemical changes produced by electrical current and the production of electricity by chemical reactions.

Law of Partial Pressures (Dalton's Law)

The total pressure exerted by a mixture of gases is the sum of the partial pressures of the individual gases.

Ionization Energy

The minimum amount of energy required to remove the most loosely held electron of an isolated gaseous atom or ion.

How to keep flowers in a vase for long time

The best gift for a woman, as you know, is a beautiful bouquet of flowers. But the cut flowers at home quite quickly wither. But your favorite roses or tulips can keep their freshness if you use our advice. Chemistry and various chemical elements will help us in this difficult matter!