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	mads.xsd"><authority><topic authority="http://www.serbi.ula.ve/tematres/vocab/">ELEMENTOS QUIMICOS</topic></authority><related type="narrower"><topic>ABUNDANCIA COSMICA</topic></related><related type="narrower"><topic>CALCIO</topic></related><related type="narrower"><topic>COBALTO</topic></related><related type="narrower"><topic>ELEMENTOS ACTINIDOS</topic></related><related type="narrower"><topic>ELEMENTOS PESADOS</topic></related><related type="narrower"><topic>NUCLEOSINTESIS</topic></related><related type="narrower"><topic>Nucleosíntesis</topic></related><related type="narrower"><topic>OLIGOELEMENTOS</topic></related><related type="narrower"><topic>PESOS ATOMICOS</topic></related><related type="narrower"><topic>TABLA PERIODICA (QUIMICA)</topic></related><related type="narrower"><topic>VALENCIA (QUIMICA TEORICA)</topic></related><variant type="other"><topic>Química--Elementos</topic></variant></mads>