A late night text message from a VERY drunk friend!
Added:
Remixing to the correct order of electron orbitals:
1s2 2s2 2p6 3s2 3p6 3d104s2 = Zinc atomnumber 30
(to find this: add up all the 'powers': ^2 + ^2 + ^6 + .... etc. and you'll find the atom number)
the other question was on;
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5 = Bromium atomnumber 35
That is the electron configuration of Zinc.
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d1
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d7
you put 3d10 after 4s2 and that is the wrong order to put it in...
[Ar] 3d10 4s2 4p4
Group 2 (Alkaline Earth Metals) Beryllium: 1s2 2s2 Magnesium: 1s2 2s2 2p6 3s2 Calcium: 1s2 2s2 2p6 3s2 3p6 4s2 Strontium: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2 Barium: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2 4d10 5p6 6s2 Radium: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4f14 4d10 4p6 5s2 5d10 5p6 6s2 6s2 6p6 7s2
Arsenic's atomic number is 33. That means neutral arsenic has 33 protons and 33 electrons. Thus, its electron configuration is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3.
1s2, 2s2, 2p6, 3s2, 3p6, 4s1, 3d10 or [Ar]3d10, 4s1
Electronic configuration of bromine is 2, 8, 18, 7 Or in spdf notation : 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p5
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p3.
Zinc
Mg: 1s2- 2s2 - 2p6 - 3s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10
That is Arsenic.
Bromine
The complete electron configuration for the chromium(III) ion is 1s22s22p63s23p64s03d3.
Krypton, Kr, has an electron configuration of:1s2 2s2 2p63s2 3p6 3d104s2 4p6or, abbreviated:[Ar] 3d10 4s24p6