| A | B |
|---|
| crystal lattice | repeating three-dimensional pattern that forms when ions bond |
| ions | charged particles that form when atoms gain or lose electrons |
| chemical bond | interaction that holds two atoms together |
| valence electron | electron in the outermost energy level of an atom |
| superscript | the number used in front of a chemical formula to balance chemical equations |
| molecule | smallest unit of a covalent compund that keeps all of the properties of that compound |
| covalent bond | bond that forms when atoms share one or more pairs of electrons |
| subscript | the number that cannot change to balance a chemical equation |
| ionic bond | bond that forms when electrons are transferred from one atom to another |
| atomic number | number of protons in an atom |
| electron-dot diagram | used to show the valence electrons in an atom |
| example of a formula that contains two different elements | CO |
| what is the maximum number of electrons that can be in the first energy level? | 2 |
| atoms what do atoms gain, lose, or share in a bond? | electrons |
| what are electrons are organized by? | energy levels |
| elements ending in -ide | the ion has a negative charge |
| synthesis reaction | when two or more substances combine to form one new compound |
| group numbers | determine the number of valence electrons |
| state change | is NOT a sign of a chemical reaction |
| non metals | most likely gain electrons when bonds are formed |
