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Вопрос № 1072220 - Английский язык

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Compound is a substance in which the atoms of two or more elements are joined together by chemical bonds. Because of these bonds, it is very difficult to split a compound into its individual elements. The type and number of bonds formed depend on the electrons (particles with a negative electrical charge) in each atom. The properties of a compound can be very different from those of the elements it contains. For example, the salt we use in our food is a harmless compound, yet it is made up of two dangerous elements – sodium, which reacts violently with air, and chlorine, which is poisonous in large quantities.
Варианты ответов
  • элемент
  • химическое соединение
  • электрон
  • вещество
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Вопрос задал(а): Анонимный пользователь, 13 Ноябрь 2020 в 18:15
На вопрос ответил(а): Анастасия Степанова, 13 Ноябрь 2020 в 18:15

Похожие вопросы

Вопрос № 912157

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How many types of atom does carbon dioxide have?
Aluminium (Al), water (H2O), oxygen (O2) and carbon dioxide (CO2) are substances. Some substances are elements and some substances are compounds. Elements have only one type of atom whereas compounds have more than one type.
Aluminium is an element: it has only one type of atom (i.e. it has only aluminium atoms). Oxygen has only one type of atom, so it is also an element.
Carbon dioxide has two types of atom (carbon and oxygen), so it is a compound. Sulphuric acid (H2SO4) is also a compound: it has three types of atom (hydrogen, sulphur and oxygen). Water is also a compound.
Carbon dioxide has three types of atom.
Carbon dioxide has one type of atom.
Carbon dioxide has many types of atom.
Carbon dioxide has two types of atom.

Вопрос № 1072607

Установите последовательность пропущенных в тексте слов.
A molecule is a group of atoms joined together by chemical bonds. The molecules of an 1_______ are identical and contain atoms of one type only. Oxygen gas, for example, has 2_______ made up of two oxygen atoms. The molecules of a compound are also 3_______, but in this case each molecule 4_______ atoms of more than one type. In water, for example, each molecule is made up of two hydrogen atoms and one oxygen atom. All gases, most liquids, and many nonmetallic solids consist of molecules.
element
molecules
identical
contains

Другие вопросы по предмету Английский язык

Вопрос № 1072221

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A chemical reaction occurs when substances change into new substances. For this to happen, the bonds between atoms and molecules must break and re-form in different ways. Because the bonds can be strong, energy, usually in the form of heat, is often needed to start a reaction. The new substances have properties different from those of the original substances. Chemical reactions do not occur only in laboratories; they happen all around us – for example, when cars rust and when food is cooked.
не происходит
не произойдут
не происходили
не происходят

Вопрос № 1072222

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The Italian physicist Alessandro Volta was a pioneer in the development of electricity. 1_______. His work impressed the French leader Napoleon Bonaparte, who made him a count. 2_______. Volta also studied the properties of air. 3_______. This work was largely ignored, and the same idea was later advanced by others. 4_______.
He created the first electric battery while working in Paris
Volta was honored again after his death, when the volt, the unit for measuring electromotive force, was named for him
In 1783 he proposed the law that air expands at a constant rate with increasing temperature
Only in 1927 he was credited for his discovery

Вопрос № 1072223

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The Earth is one of nine planets that travel around the sun in the solar system. 1_______. It is the only planet known to support life. 2_______. At first this mass was very cold. 3_______. Heavy metals collected at the center and rocks floated near the surface. After millions of years, the rocks formed a hard crust. 4_______.
Of these planets, the Earth is the third nearest the sun
About 5 billion years ago, a cloud of gas and dust began to condense into a solid mass – the young Earth
But later it was melted by radioactivity
And the oceans and the atmosphere appeared

Вопрос № 1072224

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A solution forms when one substance (usually solid) dissolves in another (usually a liquid). The solid breaks up into tiny particles and spreads throughout the liquid. 1_______. Solutions are always clear. 2_______. Solid particles spread throughout the liquid. 3_______. If you leave a suspension to stand, most of the solid particles will eventually sink. 4_______.
So that you can no longer see any solid
If the mixture is cloudy, it is a suspension
But the particles are bigger than those of a solution
A solution will not separate out in this way
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