Question

Use Mendeleev's Periodic Table to predict the formulae for the oxides of the following elements:


K , C, Al , si, Ba​

Answer 1

$\huge \sf{Answer}$

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

C is in group 4. Therefore, the oxide will be CO2.

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

Si is in group 4. Therefore, the oxide will be SiO2.

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

Answer 2

The Mendeleev's table is divided into 6 periods and 8 groups. Identify the group of the element for which the formula's are asked.

At the top of the group the formula for oxide and hydride are given. The element is represented by R, replace R with the element.

Element Group Oxide

K. I K2O

C IV CO2

Al III Al2O3

Si IV SiO2

Ba ll BaO