Starting out in chemistry and looking for information to expand your knowledge? In this section, you will find the necessary basics and many interesting facts about chemistry!
The phenomenon of radioactivity (or radioactive emission) was first observed during Henri Becquerel’s experiment on X-rays (Roentgen radiation) in 1896. His experiment was to confirm the thesis regarding materials made of uranium, according to which it was supposed to emit X-rays after absorbing sunlight.
Atoms are the tiny units that make up all the matter in the universe. The energy of an atom is concentrated in its nucleus. It is the force that holds the components of the nucleus together. A large amount of energy is stored in the atomic nucleus. In order to be transformed, for example, into […]
The colours of the observed sky change depending on the time of day. In cloudless conditions, in the afternoon hours, an intense blue is visible, but at sunrise and sunset, yellow, orange and red colours appear. The colours we see in the sky are the result of an optical phenomenon called Rayleigh scattering.
Compounds of elemental carbon occurring in nature are so numerous that the branch of chemistry dealing with their characterisation, synthesis, and study of their properties is called organic chemistry. The largest group of compounds are hydrocarbons. As the name suggests, these are compounds of carbon and hydrogen. Due to the variety of these substances, they […]
The transformations occurring in atomic nuclei, which are the result of transition into an energy state other than the lowest possible, are referred to as nuclear disintegration. The formation of such low-stability nuclei may result not only from laboratory conditions but also from changes occurring naturally. That subtype of unstable nuclei is called radioactive nuclei. […]
We come across the chemistry term very often. This popular word has many meanings. In colloquial language, the term ‘chemical’ means unhealthy or artificial. Chemistry is also an abbreviation for chemotherapy and the chemical industry. The main meaning of the word, however, relates to science. What is chemistry, where is it used and who contributed […]
The term “element” refers to atoms whose nuclei contain a particular number of protons. Apart from them, an atomic nucleus also consists of other molecules: neutrons. Their number within a single element may vary. In such a case, we talk about isotopes, i.e. variants of a given element that have different numbers of neutrons in […]
The laboratory is a place where we conduct experiments that require specifically controlled conditions. It may be a small room or a large hall, but the most important is what is inside. Obviously, the equipment present in a laboratory may vary depending on its speciality. Even so, there are many instruments which are universal and […]
In everyday life, individual, pure substances are rare to come by. We are much more often faced with their mixtures. Examples can include tea, milk or metal alloys. A mixture is a combination of two or more substances obtained by physical methods (which means there are no chemical bonds between them). If individual components of […]
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