Wrie the atomic number electronic configuration and valency of first to 10 element
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hydrogen 1=(1)=1
helium 2=(2,0)=0
lithium 3=(2,1)=1
beryllium 4=(2,2)=2
boron 5=(2,3)=3
carbon 6=(2,4)=4
nitrogen 7=(2,5)=3
oxygen 8=(2,6)=2
fluorine 9=(2,7)=1
neon 10=(2,8)=0
helium 2=(2,0)=0
lithium 3=(2,1)=1
beryllium 4=(2,2)=2
boron 5=(2,3)=3
carbon 6=(2,4)=4
nitrogen 7=(2,5)=3
oxygen 8=(2,6)=2
fluorine 9=(2,7)=1
neon 10=(2,8)=0
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