Step into the Generalities in Chemistry, where the foundations of this diverse field are explored. Delve into the fundamental principles and concepts that underpin the study of matter and its transformations. From atomic structure and chemical bonding to states of matter and chemical reactions, uncover the key elements that shape our understanding of chemistry. Embark on a journey of discovery as you unravel the secrets and intricacies of this fascinating science.
A chemical change is a variation in the internal structure of a compound, to the point that it will be different from its origin. Moreover, this type of change is usually irreversible. A chemical change is a change in the nature of the substance. It is a profound modification that implies transformations in the composition … Read more
On our planet, matter is essentially present in three different forms or states of aggregation: the solid state, the liquid state and the gaseous state. Each of them presents observable properties that are characteristic of it. Thus, solids have their own shape and volume; liquids, on the other hand, although they adopt the shape of … Read more
Substances are characterized by their properties and by their composition. Color, melting point and boiling point are physical properties. A physical property can be measured and observed without changing the composition or identity of the substance. On the other hand, the statement “gaseous hydrogen burns in the presence of gaseous oxygen to form water” describes … Read more
Chemical Element and Chemical Compound Matter is made up of tiny units called atoms. A chemical element is a substance made up of only one type of atom. Approximately 90 of these elements can be found in nature. The rest do not occur naturally and can only be obtained artificially. Chemical compounds are substances in … Read more
As you will remember, matter is everything that surrounds us, everything that has mass and occupies a place in space. Chemistry is the science that studies matter, its properties, its qualitative and quantitative constitution, the changes it undergoes, as well as the energy variations that accompany the transformations in which it is involved. Since ancient … Read more
Science differs from other fields of knowledge in the method scientists use to acquire knowledge and in the special meaning they attach to it. Scientific knowledge can be used to explain natural phenomena and predict future events. The scientific method originated in the 17th century with people such as Galileo, Francis Bacon, Robert Boyle and … Read more
Ancient Period This period covers from primitive man through the ancient civilizations of China, India and Greece and their contemporaries up to 350 BC. The first people who began to use instruments made use of nature as it was. For example, stones, tree branches or animal bones could be used as valuable tools. However, nature … Read more
Chemistry is the study of the properties of materials and the changes they undergo. Matter is anything that occupies space and has mass. All the objects we see around us are material objects. The gases found in the atmosphere are also considered matter even though we cannot see them. The properties of matter correspond to … Read more
What is the pH scale? The pOH scale measures hydroxide ion (OH-) concentration in a solution, inversely to the pH scale. Lower pOH values indicate higher alkalinity, while higher values suggest greater acidity. pH + pOH always equals 14 for neutral solutions at a specific temperature, aiding in acidity and basicity assessment. However, it is … Read more
What is the Electron Configuration? The electron configuration is the summary of where the electrons are located around a nucleus. Each neutral atom has a number of electrons equal to its number of protons. Therefore, these electrons are located in orbitals in an arrangement around the nucleus. The notation indicates that indicates their energy and … Read more
