How many groups and periods are there in periodic table If two elements X and Y belong to group 1 and 2 in the same period of periodic table Then compare that from two groups 1 the valency of their oxides.2 then molecular formula of their oxides
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There are 7 period and 18 groups in the modern periodic table.
(i) it depend on the element that how much valency it has.
Group 1.
(a) X2O-----> this is oxide of X
because X has valency 1 and O is
2.
(b) YO------> this is oxide of Y because
Y has valency 2 and O is 2.
(ii) Molecular formula of there oxides
are
(a) X+O--------->X2O
(b) Y+O-------->YO
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