E substances in food are food additives that have been approved for use in the European Union. These additives are assigned an "E number" which indicates that they have passed safety assessments and are considered safe for consumption. E substances can serve various purposes in food, such as enhancing flavor, improving texture, or extending shelf life. It is important to note that not all E substances are harmful, and many are commonly used in everyday food products. **

Fast food itself is not typically considered addictive in the same way that substances like drugs or alcohol are. However, fast food can be high in sugar, fat, and salt, which can trigger pleasure centers in the brain and lead to cravings and overeating. Additionally, some fast food items may contain additives and preservatives that can be addictive in the sense that they create a desire for more of the same food. Overall, while fast food may not contain addictive substances in the traditional sense, it can still contribute to unhealthy eating habits and potential addiction-like behaviors. **

Ion substances are compounds made up of positively and negatively charged ions, such as sodium chloride (NaCl) or calcium carbonate (CaCO3). These substances are held together by electrostatic forces between the ions. Molecule substances, on the other hand, are made up of covalently bonded atoms, such as water (H2O) or carbon dioxide (CO2). These substances are held together by sharing electrons between the atoms. In summary, ion substances are composed of charged ions held together by electrostatic forces, while molecule substances are composed of covalently bonded atoms held together by shared electrons. **

Cat food does not typically contain addictive substances. However, some cat foods may contain ingredients such as animal by-products, artificial flavors, and preservatives that could potentially be harmful to cats if consumed in large quantities. It's important to carefully read the ingredients list on cat food packaging and consult with a veterinarian to ensure that the food is safe and healthy for your cat. **

Elementary substances belong to the category of pure chemical elements. These are the basic building blocks of matter and cannot be broken down into simpler substances by ordinary chemical reactions. Examples of elementary substances include hydrogen, oxygen, carbon, and iron. Each element is defined by its unique atomic structure and properties. **

Elemental substances belong to the group of pure substances, which are made up of only one type of atom. These elemental substances are the building blocks of all matter and cannot be broken down into simpler substances by chemical means. Examples of elemental substances include hydrogen, oxygen, carbon, and gold. **

Polar substances dissolve in polar substances because they have similar intermolecular forces. Polar substances, such as water, have a partial positive and partial negative charge, which allows them to form hydrogen bonds with other polar molecules. When a polar substance is added to a polar solvent, the partial charges on the solvent molecules attract and surround the solute molecules, causing them to separate and disperse evenly throughout the solvent. This allows the polar solute to dissolve in the polar solvent, forming a homogeneous mixture. **

Yes, organic substances can split and combine with other substances through chemical reactions. For example, organic compounds can undergo processes such as hydrolysis, where they split into smaller molecules by reacting with water. Additionally, organic substances can also combine with other substances through synthesis reactions, where new organic compounds are formed by combining smaller molecules. These chemical reactions are fundamental to the behavior and properties of organic substances in living organisms and in the environment. **