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Chemistry, 06.06.2020 04:01 itsyagirlbella

9. Ustal symbole pierwiastków chemicznych ukrytych pod oznaczeniami X i Z, które tworzą związek chemiczny o wzorze sumarycznym X2Z5. O pierwiastkach X i Z wiadomo, że: 2 p. • pierwiastek chemiczny Z leży w 2. Okresie układu okresowego, a do uzyskania oktetu elektronowego brakuje mu 2 elektronów walencyjnych, • zawartość procentowa pierwiastka X w związku chemicznym X2Z5 wynosi 26%, • atomy pierwiastków chemicznych X i Z są połączone ze sobą wiązaniami kowalencyjnymi. daje naj

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9. Ustal symbole pierwiastków chemicznych ukrytych pod oznaczeniami X i Z, które tworzą związek chem...
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