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Ions Review
Review of cations and anions
| Question | Answer |
|---|---|
| overall charge of an ionic compound | neutral |
| groups that are cations | 1A , 2A , 3A |
| groups that are anions | 5A , 6A, 7A |
| ion type that keeps the same name of the element | cation |
| ending of the name of all anions | ide |
| outside/outermost electrons ; responsible for chemical properties | valence |
| change in the number of electrons | ion |
| electrons that are closer to the nucleus of atom | core |
| Visual representation of valence electrons only | Lewis Dot structure |
| the charge of cations | positive |
| the charge of anions | negative |
| says that atoms of elements need 8 valence electrons to be stable | octet rule |
| cations do this with valence electrons | lose them |
| anions do this with valence electrons | gain til they have 8 |
| compound made between a cation and anion | ionic |
| this happens to electrons in ionic bond | transfer from cation to anion |
| element already stable with 2 valence electrons | Helium [He] |
| elements in this group do not react with others; already stable | 8A / Noble Gases |
| the number of valence electrons match this number | group number |
| name of group 7A ions only | halide |
| fastest method to predict formula of ionic compound | criss-cross |
| the number of total electrons matches this number | atomic number |
| Roman numerals are needed for the charge of ions from this block | d block (inner transition metal) elements |
| this information is needed to know the charge of the d block cation used in the ionic compound | Roman numerals |
| said place electrons in the lowest energy level first | Aufbau |
| said 2 is max # of electrons in atomic orbital and opposite spins | Pauli |
| said same spin for a single electron in multiple orbitals | Hund |
| ways to represent electrons | arrows, exponents, and dots |