it would be appreciated the choices are:
1s2, 2s2,2p6,3s2,3p6,4s1
1s2, 2p1
1s2,2s2,2d2,2p6,3p6
2007-08-06 20:35:58 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
1s2 2s2 2p6 3s2 3p6 4s1
the difficulty is that the subshell 4s fills before 3d
2007-08-06 20:46:30 · answer #1 · answered by maussy 7 · 0⤊ 0⤋
k=19 1s2 2s2 2p6 3s2 3p6 4s1
2007-08-06 21:13:01 · answer #2 · answered by INVENTOR 2 · 0⤊ 0⤋
Obviously has to be the first one:
- there's no such thing as a 2d shell, so the third is impossible; also, K being a group I metal should have an s1 outermost shell.
- 2s fills before 2p and in any case only three electrons would make it Li, not K.
2007-08-06 21:00:03 · answer #3 · answered by Scarlet Manuka 7 · 0⤊ 0⤋
Figure out which noble gas it is closest to, and remember there are 8 valence electrons. You can do simple arithmatic from there, I believe in you!
2016-05-20 04:08:13 · answer #4 · answered by ? 3 · 0⤊ 0⤋