Question

Use Mendeleev’s Periodic Table to predict the formulae for the oxides of the following elements: K, C, AI, Si, Ba.
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Answer 1

Answer:

1. K is in I group. Its oxide is K2O

2. C, is in IV group, its oxide is CO2

3. Al, is in III group, its oxide is Al2O3

4. Si, is IV group, its oxide is SiO2

5. Ba, is in II group, its oxide is BaO