Заполните пропуск Definite and regular shape taken naturally by the molecules of certain __________ ...: ответ на тест 306299 - Английский язык

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What is a crystal? A crystal is a 1_______ solid made by a natural process. Many substances absorb water from solutions when they crystallize; that is, they unite chemically with a definite proportion of 2_______. The water with which any substance unites during the process of crystallization is called the water of crystallization.
Certain 3_______ substances, for example, washing soda, give up their water of crystallization when they are exposed air; they are then reduced to 4_______. Substances that have this property are called efflorescent, and the process is called efflorescence.

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What is a crystal? A crystal is a geometrical solid made by a natural process. Many substances absorb water from solutions when they crystallize; that is, they unite chemically with a definite proportion of water. The water with which any substance unites during the process of crystallization is called the water of crystallization.
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What is a crystal?

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If a given amount of _______ is put into a machine, the very one will be developed, neither more nor less.

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This detail is covered with ______ of metal for protection.

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The term ‘reactor’ is now used in nuclear science to designate a ________ in which a control nuclear chain reaction takes place.

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The ________ of various elements recurring at regular intervals attracted Mendeleyev’s attention.