October 2018 2 40 Report
7. Relaciona: I. NH3 A. Ión II. Fe B. Molécula C. Átomo Rpta: 12. De las siguientes sustancias, indica cuáles son elementos químicos. I. Sodio II. Cromo III. Bronce a) Solo I b) Solo II c) Solo III d) I, II e) I, II, III
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