Chemical bonding is part of the discipline that studies the structure of molecules, substances and compounds through bonds between atoms. Entrance to university: professor gives chemistry tips for Enem 2024 Chemical bonds are one of the main subjects covered in the National High School Exam (NEM), within the chemistry discipline, in the natural sciences test. But, after all, what is this chemical process and how to study it for testing? This is the subject of the University Tickets section this Monday (14). ✅ Follow the g1 Piauí channel on WhatsApp The study of chemical bonding is the ability to explain the physical, chemical and mechanical properties of a material, thus allowing the creation of new materials. Simply put, a chemical bond is the union of two or more atoms. Chemical bonds are divided into: ionic, covalent and metallic bonds. These interactions between elements can occur through electron donation, sharing or delocalization. In nature there are several chemical elements. When the atoms of these elements combine, a wide variety of substances are formed as we know them. Example: Did you know that table salt we use every day? Its main ingredient is sodium chloride, an inorganic salt formed by the bond between sodium and chlorine. Enem Questions Details of the Enem G1/G1 Chemistry questions According to research by Polydro and SAS Plataforma de Educação, the chemistry topics that appeared most in the Enem tests in the last five years are: Chemical Bonds, Polarity and Force: 13.4 % Organic Reactions: 11% Organic Compounds: 9.8% Electrochemistry: 8.5% Stoichiometry: 8.5% Solutions: 7.3% Chemical Bonds In our daily lives, we come into contact with different substances, which differ in several aspects. Color, physical state, odor, smell, flammability and density are some of them. Share this news on WhatsApp Share this news on Telegram This is due to the ability of atoms to combine with other atoms (whether of the same element or different elements). And these combinations between atoms are called chemical bonds. “Be very careful with chemical bonding problems. They are always very demanding. Normally, (things) can come in a huge structure, which is the organic structure. Every group except carbon and hydrogen has a polarized group. If you have OH, NH, you have a metal associated with oxygen, you have a polar ion, a water compound, like a soap molecule”, explains chemistry professor Argiomar Alves. Bonding: Intermolecular: Ion-dipole interactions; H bond; dipole-dipole; dipole induced; 2. Intramolecular: ionic, covalent and metallic. Ionic bonds are produced by electrostatic attraction between positive ions (cations) and negative ions (anions), thus forming an ionic compound. Remember that ions are atoms that have gained or lost one or more electrons. At these junctions, electron transfer definitely occurs. A covalent bond occurs when non-metals share electrons with each other, forming molecules. An example of a covalent bond is carbon dioxide, better known as carbon dioxide (CO2), where a carbon atom (C) reacts with two oxygen atoms (O) to form a molecule of CO2. University Entrance 2024: Review all classes in the program. A metallic bond is the attractive force that holds metals together and can be explained as follows: The valence shell (CV) of a metal has one to three free electrons, which are not bonded to a specific atom in the solid. Enem 2024 exam location time announced: Enem application time: 11/3 and 10/3/2024 Answer key released: 11/20/2024 Result released: 01/13/2025 Enem 2023 🖊️ What is the exam for? It is one of the main gateways to higher education in Brazil, used as a selection criterion by public and private institutions in addition to requirements for public student aid programs. There is no way to sign up for Sisu, Prouni and Fies without taking the Enem. Enem is held on two Sundays and divides the content into areas of knowledge in addition to writing. This year the exam is scheduled to be held on November 5th and 12th. November 3: 🗺️ Human Sciences and Their Technologies: 45 multiple-choice questions from Geography, History, Philosophy and Sociology. 📚 Languages, codes and their technologies: 40 multiple-choice questions in Portuguese and literature and 5 more in foreign languages (English or Spanish). ✍️Argumentative Writing: The text must be written based on the problem situation presented. See essays from a thousand notes. November 10: 🔢 Mathematics and its technology: 45 multiple choice questions. 🧪 Natural sciences and their technologies: 45 multiple-choice questions from biology, chemistry and physics. 📲 Check out the latest news from g1 Piauí
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