| A | B |
|---|
| Chemical Bonding | combining of elements to form new substances. |
| Chemical Reaction | process in which new substances undergo physical and chemical changes that result in the formation of new substances with different properties. |
| Compound | substance made up of molecules that contain more than one kind of atom; two or more elements chemically bonded. |
| Covalent Bonding | bonding that involves sharing of electrons. |
| Crystal Lattice | regular, repeating arrangement of atoms. |
| Diatomic Element (molecule) | element whose atoms form covalent bonds with another atom of the same element. |
| Electron | negatively charged subatomic particle found in the area outside the nucleus of an atom. |
| Electron Affinity | tendency of an atom to attract electrons. |
| Electronegative | tending to attract electrons to form a chemical bond. |
| Electropositive | tending to release electrons to form chemical bonds. |
| Ion | an atom that has become charged by gaining or losing an electron. |
| Ionic Bonding | bonding that involves the transfer of electrons. |
| Ionization Energy | energy needed to remove electrons and form ions. |
| Metallic Bonding | bond formed by atoms of metals, in which the outer electrons of the atoms form a common electron cloud. |
| Molecule | combination of atoms formed by covalent bond. |
| Oxidation Number | number of electrons an atom gains, loses, or shares when it forms chemical bonds. |
| Rule of Octet | all elements except hydrogen ad helium will bond until the outer shell (energy level) has eight electrons. |
| Valence Electrons | electrons in the outermost energy level of an atom. |
| Ionization | process of removing electrons and forming ions. |
| Electron-Dot Diagram | diagram showing electron sharing that occurs in covalent bonding. |
| Polyatomic Ion | a group of covalently bonded atoms that acts like a single atom when combining with other atoms. |
