кереғарлық

кереғарлық

A property associated with molecules when the center of positive charge and the center of negative charge don't coincide. See also polar molecule and polar bond .

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Κλάδος/Τομέας: Chemistry
Category: General chemistry
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The ability to perceive differences between an object and its background.

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Chemistry; General chemistry

A compound that consists of only carbon and hydrogen, that contains at least one carbon-carbon double bond. Alkene names end with -ene. Examples are ethylene (CH2=CH2); 1-propene ...

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A colloid formed from tiny liquid droplets suspended in another, immiscible liquid. Milk is an example of an emulsion.

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An elementary particle produced by certain nuclear decay processes. Neutrinos have no charge and extremely small masses compared to other subatomic particles.

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A device that senses temperature changes by using a pair of joined wires made of dissimilar metals that produces a voltage that changes with temperature.

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An insulated vessel for measuring the amount of heat absorbed or released by a chemical or physical change.

гидроксил

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1. An -OH group within a molecule. 2. A free radical formed by abstraction of a hydrogen atom from water.

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Κλάδος/Τομέας: Αστρονομία Category: Galaxy

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The two giant bubbles of high-energy gamma rays protruding from the Milky Way, each spanning 25,000 light-years across, roughly the size of the galaxy ...