Тест по Химия и опазване на околната среда за 7 клас

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    23-Oct-2015

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<p> 7 . </p> <p>1. ?) ) ) ) </p> <p>2. ?) ) ) ) </p> <p>3. ?) Si) S) O) Cl</p> <p>4. ?) O ) 32 3 ) 4Rb ) 4Ca </p> <p>5. ?) I) II) II, IV, VI) I, III, V</p> <p>6. :) ) ) ) 7. : Na + O2 Na2O..........................................................................</p> <p>8. :............................................................................................................................................................................................................................................................................................................</p> <p>9. :......................................................................................................................................................</p> <p>10. 4 .........................................................................................................................................................................................</p>