COMPOUNDS

• Compounds refer to the combination of elements
• homogenous substances are when components are mixed
• heterogenous substances occur when components mix but are still separated
• The octet rule states that elements gain or lose electrons to attain an electron configuration of the nearest noble gas
• happy elements are found at the right side of the periodic table, they are stable and content
• All elements need 8 valence electrons in order to be stable
• The highest energy level answers the number of orbitals of an atom
• The exponents of the electron configuration correspond to the electrons in each orbital
• Combine the exponents of those that have the same energy levels
• Ions are charged atoms that has a positive or negative charge
• A cation has a positive charge, it is when an atom gives an electron
• An anion has a negative charge, it gains atoms (always takes)
• The valence shell is the last orbit while the valence electron is found on it
• Almost all metal elements form cations since they tend to give atoms
• Almost all nonmetal elements form anions, they tend to receive/ gain electrons
• When naming a Cation, the name of the element is used
• When naming an Anion, the element name ends in -ide