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бор

Element 5, atomic weight 10.811. Hard yellow crystals or brown amorphous powder, used as a neutron absorber in nuclear chemistry and as a hardener in alloys .

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Бор атомы

화학; 일반 화학

Bohr made significant contributions to the atom. He understood the line spectra-- the reason why only certain wavelengths are emitted when atoms jump down levels.

Бор атомы

화학; 일반 화학

A model of the atom that explains emission and absorption of radiation as transitions between stationary electronic states in which the electron orbits the nucleus at a definite ...

Бор радиусы

화학; 일반 화학

The atomic unit of length, equal to 0.529 177 2083 × 10-10 m, with an uncertainty of 0.000 000 0019 × 10-10 m (1998 CODATA values)

олефин

화학; 일반 화학

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

화학; 일반 화학

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

нейтрино

화학; 일반 화학

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

қос жылу

화학; 일반 화학

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

화학; 일반 화학

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

гидроксил

화학; 일반 화학

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

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нормативті айтылу

Received Pronunciation (RP), also called the Queen's (or King's) English,[1] Oxford English,[2] or BBC English, is the accent of Standard English in ...