write electronic configuration of elements from atomic number 21 to 40
Answers
Answer:
21 Scandium [Ar]3d14s2
22 Titanium [Ar]3d24s2
23 Vanadium [Ar]3d34s2
24 Chromium [Ar]3d54s1
25 Manganese [Ar]3d54s2
26 Iron [Ar]3d64s2
27 Cobalt [Ar]3d74s2
28 Nickel [Ar]3d84s2
29 Copper [Ar]3d104s1
30 Zinc [Ar]3d104s2
31 Gallium [Ar]3d104s24p1
32 Germanium [Ar]3d104s24p2
33 Arsenic [Ar]3d104s24p3
34 Selenium [Ar]3d104s24p4
35 Bromine [Ar]3d104s24p5
36 Krypton [Ar]3d104s24p6
37 Rubidium [Kr]5s1
38 Strontium [Kr]5s2
39 Yttrium [Kr]4d15s2
40 Zirconium [Kr]4d25s2
Answer:
This page shows the electron configurations of the neutral gaseous atoms in their ground states. For each atom the subshells are given first in concise form, then with all subshells written out, followed by the number of electrons per shell. Electron configurations of elements beyond hassium (element 108), including those of the undiscovered elements beyond oganesson (element 118), are predicted.
As an approximate rule, electron configurations are given by the Aufbau principle and the Madelung rule. However there are numerous exceptions; for example the lightest exception is chromium, which would be predicted to have the configuration 1s2 2s2 2p6 3s2 3p6 3d4 4s2, written as [Ar] 3d4 4s2, but whose actual configuration given in the table below is [Ar] 3d5 4s1.
Note that these electron configurations are given for neutral atoms in the gas phase, which are not the same as the electron configurations for the same atoms in chemical environments. In many cases, multiple configurations are within a small range of energies and the irregularities shown above are quite irrelevant chemically.
Explanation:
Legend
1s 2s 2p 3s 3p 3d 4s 4p 4d 4f 5s 5p 5d 5f 5g 6s 6p 6d 6f 7s 7p 7d 8s 8p 9s 9p
1 H hydrogen: 1s1
1s1
1
2 He helium: 1s2
1s2
2
3 Li lithium: [He] 2s1
1s2 2s1
2 1
4 Be beryllium: [He] 2s2
1s2 2s2
2 2
5 B boron: [He] 2s2 2p1
1s2 2s2 2p1
2 3
6 C carbon: [He] 2s2 2p2
1s2 2s2 2p2
2 4
7 N nitrogen: [He] 2s2 2p3
1s2 2s2 2p3
2 5
8 O oxygen: [He] 2s2 2p4
1s2 2s2 2p4
2 6
9 F fluorine: [He] 2s2 2p5
1s2 2s2 2p5
2 7
10 Ne neon: [He] 2s2 2p6
1s2 2s2 2p6
2 8
11 Na sodium: [Ne] 3s1
1s2 2s2 2p6 3s1
2 8 1
12 Mg magnesium: [Ne] 3s2
1s2 2s2 2p6 3s2
2 8 2
13 Al aluminium: [Ne] 3s2 3p1
1s2 2s2 2p6 3s2 3p1
2 8 3
14 Si silicon: [Ne] 3s2 3p2
1s2 2s2 2p6 3s2 3p2
2 8 4
15 P phosphorus: [Ne] 3s2 3p3
1s2 2s2 2p6 3s2 3p3
2 8 5
16 S sulfur: [Ne] 3s2 3p4
1s2 2s2 2p6 3s2 3p4
2 8 6
17 Cl chlorine: [Ne] 3s2 3p5
1s2 2s2 2p6 3s2 3p5
2 8 7
18 Ar argon: [Ne] 3s2 3p6
1s2 2s2 2p6 3s2 3p6
2 8 8
19 K potassium: [Ar] 4s1
1s2 2s2 2p6 3s2 3p6 4s1
2 8 8 1
20 Ca calcium: [Ar] 4s2
1s2 2s2 2p6 3s2 3p6 4s2
2 8 8 2
21 Sc scandium: [Ar] 3d1 4s2
1s2 2s2 2p6 3s2 3p6 3d1 4s2
2 8 9 2
22 Ti titanium: [Ar] 3d2 4s2
1s2 2s2 2p6 3s2 3p6 3d2 4s2
2 8 10 2
23 V vanadium: [Ar] 3d3 4s2
1s2 2s2 2p6 3s2 3p6 3d3 4s2
2 8 11 2
24 Cr chromium: [Ar] 3d5 4s1
1s2 2s2 2p6 3s2 3p6 3d5 4s1
2 8 13 1
25 Mn manganese: [Ar] 3d5 4s2
1s2 2s2 2p6 3s2 3p6 3d5 4s2
2 8 13 2
26 Fe iron: [Ar] 3d6 4s2
1s2 2s2 2p6 3s2 3p6 3d6 4s2
2 8 14 2
27 Co cobalt: [Ar] 3d7 4s2
1s2 2s2 2p6 3s2 3p6 3d7 4s2
2 8 15 2
28 Ni nickel: [Ar] 3d8 4s2 or [Ar] 3d9 4s1 (disputed, see Nickel article)
1s2 2s2 2p6 3s2 3p6 3d8 4s2
2 8 16 2
29 Cu copper: [Ar] 3d10 4s1
1s2 2s2 2p6 3s2 3p6 3d10 4s1
2 8 18 1
30 Zn zinc: [Ar] 3d10 4s2
1s2 2s2 2p6 3s2 3p6 3d10 4s2
2 8 18 2
31 Ga gallium: [Ar] 3d10 4s2 4p1
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p1
2 8 18 3
32 Ge germanium: [Ar] 3d10 4s2 4p2
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p2
2 8 18 4
33 As arsenic: [Ar] 3d10 4s2 4p3
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p3
2 8 18 5
34 Se selenium: [Ar] 3d10 4s2 4p4
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p4
2 8 18 6
35 Br bromine: [Ar] 3d10 4s2 4p5
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p5
2 8 18 7
36 Kr krypton: [Ar] 3d10 4s2 4p6
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6
2 8 18 8
37 Rb rubidium: [Kr] 5s1
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s1
2 8 18 8 1
38 Sr strontium: [Kr] 5s2
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2
2 8 18 8 2
39 Y yttrium: [Kr] 4d1 5s2
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d1 5s2
2 8 18 9 2
40 Zr zirconium: [Kr] 4d2 5s2
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d2 5s2
2 8 18 10