Valence-shell electron configuration advice?

Question

Does anyone have any helpful hints for remembering stuff about valence shell electron configuration?

Answer 1

Check your periodic table... Arranged in the big blocks
S (alkali metals ) D (transitions) P (nonmetals etc)

F (actinides and lanthanides
(Check http://en.wikipedia.org/wiki/Periodic_table_(standard))

Basically spdf refer to their valence electrons so you'll know that, say arsenic. It's in the p-block, 3rd from the start of the block. So you know that it's outer electrons are np3
As for what n is, count down from the top of the block (which starts at He), As is on the 4th row from the top, so its outer shell electrons are 4p3 - you can start filling in the entire electronic configuration backwards from here...

Answer 2

Use thew formula 2N squared the position N = the shell variety this may enable optimal config. numbers for each shell and one among those valance electrons. this also might want to in optimal situations = the gang variety social gathering Na =11 First shell =2 utilizing formula 2d = 8 utilizing formula and intensely last shell = a million thinking the very reality that you in worry-loose words have one elec. left to position in.

Answer 3

Use thew formula 2N squared
Where N = the shell number
This will allow maximum config. numbers for each shell and the number of valance electrons. This should also in most cases = the group number
Example Na =11 First shell =2 using formula second = 8 using formula and last shell = 1 because you only have one elec. left to put in.