The third-period elements can hold up up to 18 valence shell electrons. Apparently third-period elements can depart from the octet rule by having more than eight electrons in their valence shells. From the choices you have given, P, Cl, Se and Sn are all capable of having more than 4 pairs of valence electrons.his automatically eliminates carbon, oxygen, boron and fluorine. Tin will tend to form either a +2 or +4 ion, so that's eliminated. Chlorine is in the 3rd period, but because of it's high electronegativity, it will never be the central atom in a compound.
Amount of your reduced Roth IRA contribution. If the amount you can contribute must be reduced, figure your reduced contribution limit as follows. 1  Start with your modified AGI. 2  Subtract from the amount in (1): 3  $183,000 if filing a joint return or qualifying widow(er),f the amount you can contribute must be reduced, figure your reduced contribution limit as follows. 1  Start with your modified AGI. 2  Subtract from the amount in (1): 3  $183,000 if filing a joint return or qualifying widow(er),
Line 20. If you had a qualified first-time homebuyer distribution from your Roth IRA and you made a contribution (including a conversion) to a Roth IRA for any year from 1998 through 2009, enter the amount of your qualified expenses on line 20, but do not enter more than $10,000.omplete Part II if you converted part or all of your traditional, SEP, or SIMPLE IRAs to a Roth IRA in 2014, excluding any portion you recharacterized. See item (3) under Reporting recharacterizations, earlier, for details.