Electron Configuration for Elements Electron Shells Periods on
- Slides: 14
Electron Configuration for Elements
Electron Shells • Periods on the periodic table are similar because they have the same number of electron shells. • Within these shells there are layers called sublevels', a shell can have between 1 and 4 sublevels.
Sublevels of Electron Shells Sublevel s p d f How Many Electrons can it Hold? 2 6 10 14
Electrons Shells and their Sublevels Shell or Period # 1 2 3 Sublevels Allowed s s, p, d 4 5 6 7 s, p, d, f s, p, d s, p
Blocks on the Periodic Table **the period and block an element lives in indicates the sublevel their final electrons are filling, that element will have full shells for all prior blocks.
Standard Notation of Fluorine Number of electrons in the sub level 2, 2, 5 2 1 s 2 2 s 5 2 p y g r ne E n i Ma el v s r e e L b m Nu , 2 2 , 1 Sublevels
How is the electron configuration written? • Each row of an electron configuration table is sort of like a sentence. Each 'sentence' is made up of smaller 'words'. Each 'word' follows this format: • The first number is the energy level. We can tell right away that an atom of gold contains 6 energy levels. The lowercase letter is the sub-shell. The sub-shells are named s, p, d and f. The number of available sub-shells increases as the energy level increases. For example, the first energy level only contains an s subshell while the second energy level contains both an s sub-shell and a p sub-shell. The number in superscript is the number of electrons in a sub-shell. Each sub-shell can hold only a certain number of electrons. The s subshell can hold no more than 2 electrons, the p sub-shell can hold 6, the d sub-shell can hold 10 and the f sub-shell can hold as many as 14. • •
Example: • The electron configuration for Nickel would look like: – 1 s 22 p 63 s 23 p 64 s 23 d 8
You Try: • Write the full electron configuration for gallium. – 1 s 22 p 63 s 23 p 64 s 23 d 104 p 1
One more… • Write the full electron configuration for palladium. – 1 s 22 p 63 s 23 p 64 s 23 d 104 p 65 s 24 d 8
Abbreviated vs. Unabbreviated Notation • Unabbreviated: list all sub shells as we did in the previous examples • Abbreviated: list the last noble gas prior to the element then all subshells that fall after this: – Example – abbreviated version of palladium: • [Kr] 5 s 24 d 8
Why is this important? • Understanding the electron configuration of an atom will help us identify what type of ion or compound an atom will typically form.
Electron Configuration Song • https: //www. youtube. com/watch? v=Vb 6 k. Axw. SWg. U
- Electron configuration vs noble gas configuration
- Electron shells definition
- How many electron shells does silicon have
- Electron configuration song
- Which elements have a complete outer shell
- Relative configuration
- Chiral or achiral
- Absolute and relative configuration
- Excited state electron configuration
- Orbital diagram for uranium
- Quantum numbers and electron configuration
- Shape of d orbital class 11
- Periodic trends practice problems
- Electron configuration of c
- Zeff of h-