August 2018 2 50 Report
Wyznacz wartościowość pierwiastków w podanych związkach chemicznych.
I III
Na S - Na ,S
2

KCl -
Cl O -
2 7
N O -
2 5
CO -
2
AlCl -
3
SO -
3
Al S -
2 3
Cu O -
2
PH -
3
BaO -
CuCl -
2
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