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Test initial

Test initial. Reactii chimice Clasa aVII-a C. 1. Ce sunt fenomenele chimice?. 2.Ce reprezinta simbolul chimic? Dar formula chimica?. 3.Ce se intampla cu substantele in urma fenomenelor chimice?. 4. Alege raspunsul corect! (motiveaza) a.)masa apei : b.) masa metanului:

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Test initial

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  1. Test initial Reactii chimice Clasa aVII-a C

  2. 1. Ce sunt fenomenele chimice? 2.Ce reprezinta simbolul chimic? Dar formula chimica? 3.Ce se intampla cu substantele in urma fenomenelor chimice? • 4. Alege raspunsul corect! (motiveaza) • a.)masa apei : b.) masa metanului: • 34 I. 16 • 17 II. 17 • 18 III. 23 5. Anuleaza cuvantul nepotrivit: Reactantii sunt substante care participa/ rezulta din reactie. Coeficientii stoechiometrici se scriu in stanga/ in dreapta formulei chimice.

  3. 6.Scrie ecuatiile reactiilor chimice propuse in tabelul alaturat:Reactanti Succes!

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