2007-10-10 14:25:18 · 5 answers · asked by massiel c 1 in Science & Mathematics ➔ Chemistry
The simplest answer is that each is filling the same level of the outer shell. There are all sorts of exceptions to every rule in the periodic table. You should notice that the first few levels fill the s and then go straight to p orbitals. But then they start filling I think the 4s orbits then the 3d orbits, which are in the enter shell, and then the 4p orbits. The reason given for this is that the energy level of the 4s is < 3d and 3d<4p but the later on you get the f orbits. In your textbook there should be a list of elements and the order the electrons are in.
2007-10-10 14:36:15 · answer #1 · answered by Major Bob 4 · 0⤊ 0⤋
For the nth horizontal level other than the first, the ns and np orbitals are being filled. For levels above the third, electrons are going into the ns orbital for the first two elements, which are alkali and alkaline earth elements, after that inner d or f orbitals are being filled.
When the inner orbitals are filled, the np orbitals are filled in. the elements involved are the III, IV, V, VI, VII (the halogens), and VIII (the "inert" gases).
2007-10-10 21:34:46 · answer #2 · answered by cattbarf 7 · 0⤊ 0⤋
They all have the same amount of E levels (shells) :P
2007-10-10 21:27:41 · answer #3 · answered by 4th and Long 3 · 0⤊ 0⤋
i think it mean their a gas IM NOT SURE DONT TAKE MY ADVICE
2007-10-10 21:27:54 · answer #4 · answered by Wharf Rat 2 · 0⤊ 0⤋
same period.
2007-10-10 21:27:37 · answer #5 · answered by Anonymous · 0⤊ 0⤋