There will be increase of electrons in the outermost orbit & increase in of protons in the nucleus.So there more attraction bcause in a period there a fixed outermost orbit.So sheilding effect will not be able to resist attraction.
2007-02-11 01:19:47 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
There is a shielding effect, but it doesn't change as you go across a period - it stays fixed, becuase the number of inner electrons (the ones that do the shielding) stays the same. Outer electrons don't shield each other.
2007-02-11 01:24:05 · answer #1 · answered by Gervald F 7 · 0⤊ 0⤋
Also, as the number of electrons in the orbitals increase, it leads to an increase in repulsion in the orbitals. This repulsion means that it is easier to remove the outermost electron from the orbital. Also, as you go across a period, you start entering higher energy levels (s subshell - d Subshell). This also makes electrons easier to remove.
2007-02-11 04:08:52 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Because When we go left to right in periodic table, there is no change in principal quantum no. (n ).
--> There are no internal (n-1)d orbitals. so.....
2007-02-11 18:32:10 · answer #3 · answered by SHIKHA G 1 · 0⤊ 0⤋