electronperiodic.ppt
- 1. 1 2 3 4 5 6 7 6 7 1A 2A 3B 4B 5B 6B 7B 8B 8B 8B 1B 2B 3A 4A 5A 6A 7A 8A group # = # valence (outside) e- d p f s Row = # shells
- 2. Electron Configuration 1s1 row # shell # possibilities are 1-7 7 rows subshell possibilities are s, p, d, or f 4 subshells group # # valence e- possibilities are: s: 1 or 2 p: 1-6 d: 1-10 f: 1-14 Total e- should equal Atomic # What element has an electron configuration of 1s1?
- 3. Practice: Ask these questions every time you have to write an electron configuration • Lithium: 1. find the element on the periodic table 2. what is the period number? 3. how many shells? 4. what is the group number? 5. how many valence electrons? 6. what subshell(s) does Li have? 7. what is the electron configuration? atomic # = 3 2 2 1 1 s 1s2 2s1
- 4. Practice: Ask these questions every time you have to write an electron configuration • Boron: 1. find the element on the periodic table 2. what is the row #? 3. how many shells? 4. what is the group #? 5. how many valence electrons? 6. what subshell(s) does B have? 7. what is the electron configuration? atomic # = 5 2 2 3 3 p 1s2 2s2 2p1
- 5. Order of Electron Subshell Filling: It does not go “in order” 1s2 2s2 2p6 3p6 4p6 5p6 6p6 7p6 3s2 4s2 5s2 6s2 7s2 3d10 4d10 5d10 6d10 4f14 5f14 1s22s22p6 3p6 3s2 4s2 4p65s2 3d10 5p6 6s2 4d10 6p67s2 5d10 4f14 7p6 6d10 5f14
- 6. 1 2 3 4 5 6 7 6 7 period # = # e- shells 1A 2A 3B 4B 5B 6B 7B 8B 8B 8B 1B 2B 3A 4A 5A 6A 7A 8A group # = # valence e- d f 3d 4d 5d 6d 4f 5f Subshells d and f are “special”
- 7. Electron Configuration 1s1 row # shell # possibilities are 1-7 7 rows subshell possibilities are s, p, d, or f 4 subshells group # # valence e- possibilities are: s: 1 or 2 p: 1-6 d: 1-10 f: 1-14 Total e- should equal Atomic # What element has an electron configuration of 1s1?
- 8. Practice: Ask these questions every time you have to write an electron configuration • Lithium: 1. find the element on the periodic table 2. what is the row #? 3. how many shells? 4. what is the group #? 5. how many valence electrons? 6. what subshell(s) does Li have? 7. what is the electron configuration?
- 9. Practice: Ask these questions every time you have to write an electron configuration • Boron: 1. find the element on the periodic table 2. what is the row #? 3. how many shells? 4. what is the group #? 5. how many valence electrons? 6. what subshell(s) does B have? 7. what is the electron configuration?
- 10. Order of Electron Subshell Filling: It does not go “in order” 1s2 2s2 2p6 3p6 4p6 5p6 6p6 7p6 3s2 4s2 5s2 6s2 7s2 3d10 4d10 5d10 6d10 4f14 5f14