Name: Electronic Configuration of Elements
Uploaded: 2019-07-19
Duration: 6 min 6 s
Description: The number of protons in an atom is called its atomic number, represented by ‘Z’, while the sum of its protons and neutrons is called its mass number, given...

Question

Write the molecular formulae of oxides of the following elements by referring to the Mendeleev’s periodic table.

$Na, Si, Ca, C, Rb, P, Ba, Cl, Sn$ .

Accepted Answer

i) The sodium and rubidium belong to group I of Mendeleev's periodic table in which some elements form oxides having general formula $Na, Si, Ca, C, Rb, P, Ba, Cl, Sn$ . Here $R$ is the element and $O$ is oxygen.

The formula of an oxide of sodium is ${Na}_{2} O$ .

The formula of an oxide of rubidium is ${Rb}_{2} O$ .

ii)The carbon, silicon and tin belong to Group IV of Mendeleev's periodic table in which the general formula of oxides is ${RO}_{2}$ .

The formula of an oxide of carbon is ${CO}_{2}$

The formula of an oxide of silicon is ${SiO}_{2}$ .

The formula of an oxide of tin is ${SnO}_{2}$ .

iii) The calcium and barium belong to group II of Mendeleev's periodic table. The general formula of oxides is $RO$ .

The formula of an oxide of calcium is $CaO$ .

The formula of an oxide of barium is $BaO$ .

iv) The phosphorous belongs to group V. The general formula of oxide is $R_{2} O_{5}$ .

The formula of an oxide of phosphorous is $P_{2} O_{5}$ .

v) The chlorine belongs to group VII with the general formula of oxide is $R_{2} O_{7}$ .

The formula of an oxide of chlorine is ${Cl}_{2} O_{7}$ .

Maharashtra Board Solutions for Chapter: Periodic Classification of Elements, Exercise 4: Use your brain power

Maharashtra Board Science and Technology Solutions for Exercise - Maharashtra Board Solutions for Chapter: Periodic Classification of Elements, Exercise 4: Use your brain power

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