Question

$[tex]RO_{3}$ and $R_{2}O_{3}$ are general formulae of the oxides of the elements in Mendeleev's periodic table. Write the group number to which these oxides belong.

1.) group 4 and 5
2.) group no. 3 and 7
3.) group no. 6 and 3
4.) group no. 2 and 4

Answer 1

1.grp 4 and 5

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