Химия. Вещества. Занятие 1

- это то, из чего состоят физические тела

Chemistry is the science of substances, their properties and transformations
Substance is what consist of a physical body

химические превращения
Молекулы состоят из атомов

Substances are composed of molecules
Molecule is the smallest structural unit of matter
At the level of molecules occur chemical transformations
Molecules consist of atoms

газы
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The right kind of atoms is called a chemical element
Of the individual atoms of inert gases (noble gases)

атомов.
Два атома водорода могут соединяться с атомом кислорода и образовывать молекулу воды.
Вода – это и молекула, и жидкое вещество.
Водород – это и молекула, и газообразное вещество

The hydrogen atom can exist independently.
A hydrogen atom can form a molecule from two atoms.
Two hydrogen atoms can unite with the oxygen atom to form a molecule of water.
Water is both a molecule, and a liquid substance.
Hydrogen is a molecule, and a gaseous substance

element oxygen is necessary to understand (the concept) as:
Atom
Molecule
Simple substance
Complex substance

одного вида) называются простыми веществами

Chemical substances, which are formed by identical atoms (atoms of the same element or elements of the same species) are called simple substances

formed by different chemical elements are called complex substances.

перекись водорода

For example:
water,
carbon dioxide,
saccharose,
starch,
phosphoric acid,
hydrochloric acid,
hydrogen peroxide

атомы,
простые вещества,
сложные вещества

Each chemical element exists in three forms (States):
free atoms,
simple substances,
complex substances

вещества,
физическое тело,
молекула,
атом,
вид атома,
химический элемент,
газ,
инертный газ,
простое вещество,
сложное вещество.

The term (concept, definition),
chemistry,
a chemical property of matter (chemical substance),
transformation of matter (chemical substance),
the physical body,
molecule,
atom,
type of atom,
chemical element,
a gas,
inert gas,
simple substance,
compound substance