Question

Use mendeleev periodic table to predict the formula of a)hydrides of carbon and silicon. b)oxides of potassium, aluminum and barium

Answer 1

A)Carbon and silicon lie on the 4th group which has a general hydride formula as RH4. So the formula are CH4 and SiH4.

B)similarly, K2O, Al2O3, BaO

Answer 2

Answer:

A). silicon is present in the IV A group after carbon. their formula is SiH4 and that of carbon is CH4 , which is methane.

B). K is in group 1. Therefore, the oxide will be K2O.

Al is in group 3. Therefore, the oxide will be Al2O3.

Ba is in group 2. Therefore, the oxide will be BaO.

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