Hidrogen - Are 1 electron., Oxigen - Folosit in medicina, Sulf - Numit si pucioasa., Kalium - Potasiu, Hidrargirium - Metal lichid, Neon - Gaz rar, Fer - Folosit in obtinerea otelului, Calciu - Il gasim in oase, Iod - Se dizolva in alcool, Clor - Gaz de lupta,

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