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Electron emitted from the nucleus when a neuton decays to a proton and an electron.

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Absolute Entropy (of a substance)

The increase in the entropy of a substance as it goes from a perfectly ordered crystalline form at 0 °K (where its entropy is zero) to the temperature in question.

Entropy is a measure of the “dilution” of thermal energy.

Precipitate

An insoluble solid formed by mixing in solution the constituent ions of a slightly soluble solution.

Carbonium ion

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

Daughter Nuclide

Nuclide that is produced in a nuclear decay.

 

pH

Negative logarithm of the concentration (mol/L) of the H3O+[H+] ion, scale is commonly used over a range 0 to 14.

Molecule

The smallest particle of an element or compound capable of a stable, independent existence.

Bubbles

Have you ever noticed that soap bubbles go up in winter and fall down in summer? The reason is that warm air is lighter than cold. And in winter the difference between the air temperature in the room (especially near the windows) and the one you exhale into the bubble is enough to overcome the heaviness of its shell.

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.

Polar Bond

Covalent bond in which there is an unsymmetrical distribution of electron density.

Indicators

For acid-base titrations, organic compounds that exhibit different colors in solutions of different acidities, used to determine the point at which reaction between two solutes is complete.