Class 10SciencePeriodic Classification of ElementsMix Examples - Periodic Classification of Elements
Medium$Na, Mg, Al, Si, P, S, Cl$ and $Ar$ are the elements of the third period.
$(a)$ Which one of them is an inert gas? Why?
$(b)$ Which one of them has a valency of $4$? What kind of bond does it form: ionic or covalent?
$(c)$ Which of them are electropositive? Pick any two.
$(a)$ Which one of them is an inert gas? Why?
$(b)$ Which one of them has a valency of $4$? What kind of bond does it form: ionic or covalent?
$(c)$ Which of them are electropositive? Pick any two.
(N/A) Argon $(Ar)$ is an inert gas because its outermost shell is completely filled with $8$ electrons,making it stable.
$(b)$ Silicon $(Si)$ has a valency of $4$. It forms covalent bonds because it shares its $4$ valence electrons to complete its octet.
$(c)$ Sodium $(Na)$ and Magnesium $(Mg)$ are electropositive elements because they have a tendency to lose electrons to attain a stable noble gas configuration.
$(b)$ Silicon $(Si)$ has a valency of $4$. It forms covalent bonds because it shares its $4$ valence electrons to complete its octet.
$(c)$ Sodium $(Na)$ and Magnesium $(Mg)$ are electropositive elements because they have a tendency to lose electrons to attain a stable noble gas configuration.
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Similar Questions
$Li, Be, B$ and $C$ are the elements of the same period of the Modern Periodic Table.
$(a)$ Arrange them in increasing order of their atomic size.
$(b)$ In which shell (number) would the last electron enter for all of them?
$(c)$ Calculate the number of valence electrons in each.
$(d)$ Which element amongst them is most electropositive?
$(a)$ Arrange them in increasing order of their atomic size.
$(b)$ In which shell (number) would the last electron enter for all of them?
$(c)$ Calculate the number of valence electrons in each.
$(d)$ Which element amongst them is most electropositive?
Medium
View SolutionAn element is placed in $2^{nd}$ Group and $3^{rd}$ Period of the Periodic Table. It burns in the presence of oxygen to form a basic oxide.
$(a)$ Write a balanced chemical equation when this oxide is dissolved in water.
$(b)$ Draw the electron dot structure for the formation of this oxide.
$(a)$ Write a balanced chemical equation when this oxide is dissolved in water.
$(b)$ Draw the electron dot structure for the formation of this oxide.
Medium
View SolutionExplain the basic character of oxides of elements down the group and across the period.
Medium
View SolutionThe atomic number of $Na$ and $Mg$ is $11$ and $12$ respectively and they belong to the same period.
$(a)$ Which one would have smaller atomic size?
$(b)$ Which one would be more electropositive?
$(c)$ To which group would each one belong?
$(a)$ Which one would have smaller atomic size?
$(b)$ Which one would be more electropositive?
$(c)$ To which group would each one belong?
Medium
View SolutionName the following:
$(a)$ $A$ metal that can be cut with a knife.
$(b)$ $A$ metal that is liquid at room temperature.
$(c)$ $A$ metal that has $3$ valence electrons.
$(a)$ $A$ metal that can be cut with a knife.
$(b)$ $A$ metal that is liquid at room temperature.
$(c)$ $A$ metal that has $3$ valence electrons.
Medium
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