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Chemistry, 06.06.2020 04:57 privise

1. Legătura covalentă este legătura chimică ce se stabileşte: a) prin punere în comun de electroni; b) prin transfer de electroni; c) prin punere în comun sau prin transfer de electroni. 2. Legătura covalentă se stabileşte între: a) două metale ; b) două nemetale; c) un metal şi un nemetal. 3. O legătură covalentă se stabileşte: a) între hidrogen şi sodiu ; b) între azot şi hidrogen; c) între aluminiu şi oxigen.. 4. Legăturile covalente sunt de două feluri: a) legături covalente simple si legaturi covalente duble; b) legături covalente polare şi legături covalente nepolare; c) nici un raspuns nu este corect. 5. Selectează substanțele în moleculele cărora atomii sunt uniți prin legătură ionică: a) oxid de fosfor P2O5; b)clorură de potasiu KCl; c) apă H2O

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1. Legătura covalentă este legătura chimică ce se stabileşte: a) prin punere în comun de electroni;...

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