1.H수소2.He헬륨3.Li리튬4.Be베릴륨5.B붕소6.C탄소7.N질소8.O산소9.F플루오르(불소)10.Ne네온11.Na나트륨12.Mg마그네슘13.Al알루미늄14.Si규소15.P인16.S황...
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