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!
There are dozens of chemical elements in the Universe, on Earth and in all living organisms. They are also present in human bodies and have many functions there. Their presence and concentration affects how healthy we are, what our complexion looks like and our current mood. So it is worth getting to know them better […]
By definition, chemical activity is the ability of an element to donate electrons in chemical reactions. In practice, their activity increases with decreasing electronegativity – a measure of an element’s ability to attract electrons. If a metal does not attract electrons strongly, it is more reactive. A reference element, hydrogen, is used to classify the […]
A homologous series is a term that refers to collections of chemical compounds that have very similar chemical structures and properties. It is possible to record such compounds with a common molecular formula. Another definition of a homologous series states that it is a sequence of successive compounds whose structure changes from the previous one […]
Most chemical elements, with the exception of the noble gases, occur virtually only in the form of chemical compounds. Their formation occurs as a result of chemical reactions when atoms come close together. So let’s consider what they have in common and how this affects them.
Stoichiometry is the branch of general chemistry that deals with calculations concerning the quantitative course of chemical reactions. When working in the laboratory, it is very often necessary to know how much (mass, volume, molecules) of the substrates we need to use in order for the chemical reaction we are carrying out to take place […]
Fossils, which are non-renewable energy sources, are used as fossil fuels. These include coal, oil, natural gas and peat. Fossil fuels are substances of organic origin. Their basic constituents are elements such as carbon, hydrogen and sulphur. During combustion processes, they are oxidised, resulting in the formation of the corresponding oxides. The oxidation reaction also […]
Mixtures are two or more substances mixed together mechanically. They can occur in all three states of matter and they are easily divided into homogeneous and heterogeneous. So let’s get to know them better!
In chemistry, some chemical compounds form special bonds with water molecules. These are not chemical bonds, but short-range interactions that specifically determine the properties of these compounds. We are talking about hydrates. Their properties are readily used in selected industrial sectors. The most popular hydrated salt is undoubtedly gypsum, or calcium sulphate dihydrate (VI), which […]
Acetaldehyde is also known under the systematic name ‘ethanal’. The CAS identification number assigned to the substance is 75-07-0. Its molecular formula is C2H4O, but the equally correct form CH3CHO is more commonly used in notation.
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