I thought this might help for more practice with knowing the electron configuration an for other ways as well.
Electronic configuration of various atoms are given in following table with valence subshell.
Table 4
Atomic No.
|
Element
|
Atomic wt.
|
Eletronic configuration
|
Valence subshell
|
Common valences
|
|
|
|
n=1
|
n=2
|
n=3
|
|
|
1
|
Hydrogen
|
1
|
1s1
|
|
|
1s1
|
+1, -1
|
2
|
Helium
|
4
|
1s2
|
|
|
1s2
|
0
|
3
|
Lithium
|
7
|
1s2
|
2s1
|
|
2s1
|
|
|
+1
|
|
|
|
|
|
|
4
|
Beryllium
|
9
|
1s2
|
2s2
|
|
2s2
|
+2
|
5
|
Boron
|
11
|
1s2
|
2s22p1
|
|
2p1
|
+3
|
6
|
Carbon
|
12
|
1s2
|
2s22p2
|
|
2p2
|
+4, +2, -4
|
7
|
Nitrogen
|
14
|
1s2
|
2s22p3
|
|
2p3
|
+5, +3, -3
|
8
|
Oxygen
|
16
|
1s2
|
2s22p4
|
|
2p4
|
-2
|
9
|
Fluorine
|
19
|
1s2
|
2s22p5
|
|
2p5
|
-1
|
10
|
Neon
|
20
|
1s2
|
2s22p6
|
|
2p6
|
0
|
11
|
Sodium
|
23
|
1s2
|
2s22p6
|
3s1
|
3s1
|
+1
|
12
|
Magnesium
|
24
|
1s2
|
2s22p6
|
3s2
|
3s2
|
+2
|
13
|
Aluminium
|
27
|
1s2
|
2s23s2
|
3p1
|
3p1
|
+3
|
14
|
Silicon
|
28
|
1s2
|
2s22p6
|
3s23p2
|
3p2
|
+4
|
15
|
Phosphorous
|
31
|
1s2
|
2s22p6
|
3s23p3
|
3p3
|
+5 , +3 , -3
|
Comments (0)
You don't have permission to comment on this page.