элемент

элемент

An element is a substance composed of atoms with identical atomic number . The older definition of element (an element is a pure substance that can't be decomposed chemically) was made obsolete by the discovery of isotopes .

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олефин

Bahan-bahan kimia; Kimia secara umum

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 ...

майшыт

Bahan-bahan kimia; Kimia secara umum

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

нейтрино

Bahan-bahan kimia; Kimia secara umum

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

қос жылу

Bahan-bahan kimia; Kimia secara umum

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.

калориметр

Bahan-bahan kimia; Kimia secara umum

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

гидроксил

Bahan-bahan kimia; Kimia secara umum

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

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Muslim holiday that marks the end of Ramadan, Muslims are not only celebrating the end of fasting, but thanking GOD for the help and strength that he ...