Question

first 20 elements with electronic configuration

Answer 1

1. hydrogen ( 1 )
2.helium( 2 )
3. lithium( 2, 1 )
4. beryllium ( 2 , 2)
5.boron ( 2, 3)
6.carbon( 2, 4)
7.nitrogen (2, 5)
8.oxygen( 2, 6)
9. fluorine (2, 7)
10.neon( 2, 8)
11.sodium(2, 8, 1)
12. magnesium (2, 8, 2)
13.aluminium(2,8,3)
14.silicon(2,8,4)
15.phosphorus (2,8,5)
16.sulphur(2,8,6)
17.chlorine(2,8,7)
18. argon(2,8,8)
19.potassium(2,8,8,1)
20.calcium(2,8,8,2)
hope it helps

Answer 2

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