2007-08-07 18:26:04 · 5 answers · asked by MSK 1 in Science & Mathematics ➔ Chemistry
Try this website: http://education.yahoo.com/reference/encyclopedia/entry/prdctblTABLE
2007-08-07 18:34:03 · answer #1 · answered by mommanuke 7 · 0⤊ 0⤋
Sodium (Na).
Because, in periods, the trend is as you move right, the ion size of an atom becomes smaller because there are more protons in the nucleus.
The higher positive charge pulls the electrons in closer to itself which = smaller radius
At first it didn't make sense to me either, but remember all atoms want to have the noble gas structure so essentially all the elements in a period have the same amount of elections, so the radius depends on the intensity of the positive charge in the nucleus.
I hope you understand haha.
2007-08-07 18:39:04 · answer #2 · answered by Porkie Pies 2 · 0⤊ 1⤋
Pretty sure thats argon, because the higher the number on the periodic table, the more protons/electrons it has, which means it'll also have the largest structure.
ITs been a while though....ha
2007-08-07 18:35:45 · answer #3 · answered by Sponge 2 · 0⤊ 1⤋
If you meant period 3A, then the largest stable element in that period is thallium, a highly toxic metal.
2007-08-07 18:35:15 · answer #4 · answered by lithiumdeuteride 7 · 0⤊ 0⤋
Look, this is SO simple!!! I don't have a periodic table in front of me, but it's the one with the highest atomic number. (Einstinium perhaps???)
This applies to all periods.
Irinson, read the question again.............................a period runs vertically, (not horizontally) in a periodic table!!! Sheesh!!!
2007-08-07 18:58:56 · answer #5 · answered by Anonymous · 0⤊ 0⤋