Class 11ChemistryClassification of Elements and Periodicity in PropertiesValency and oxidation state
EasyIn the periodic table,the valency of elements in any period...
- AIncreases one by one from $I \, A$ to $VII \, A$.
- BDecreases one by one from $I \, A$ to $VIII \, A$.
- CIncreases one by one from $I \, A$ to $IV \, A$ and then decreases one by one from $V \, A$ to $VII \, A$.
- DDecreases one by one from $I \, A$ to $IV \, A$ and then increases one by one from $V \, A$ to $VII \, A$.
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The formula of the oxide of an element $M$ having $IE_1 = 100 \ kJ/mol$,$IE_2 = 250 \ kJ/mol$ and $IE_3 = 1500 \ kJ/mol$ should be:
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View SolutionConsider the following information about elements $P$ and $Q$:
Element Information $P$ Period number: $2$,Group number: $15$ $Q$ Period number: $3$,Group number: $2$
Then,the formula of the compound formed by elements $P$ and $Q$ is:
| Element | Information |
|---|---|
| $P$ | Period number: $2$,Group number: $15$ |
| $Q$ | Period number: $3$,Group number: $2$ |
Then,the formula of the compound formed by elements $P$ and $Q$ is:
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View SolutionThe group number,number of valence electrons,and valency of an element with atomic number $15$,respectively,are
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