Class 10SciencePeriodic Classification of ElementsMix Examples - Periodic Classification of Elements
DifficultStudy the following table in which positions of six elements $A, B, C, D, E$ and $F$ are shown as they are in the modern periodic table:
Group $\to$ $1$ $2$ $13$ $14$ $15$ $16$ $17$ $18$ Period $2$ $A$ - - - $B$ - - $C$ Period $3$ - - $D$ $E$ - - - $F$
On the basis of the above table,answer the following questions:
$(i)$ Name the element which forms only covalent compounds.
$(ii)$ Name the element which is a metal with valency three.
$(iii)$ Name the element which is a non-metal with valency three.
$(iv)$ Out of $D$ and $E$,which is bigger in size and why?
$(v)$ Write the common name for the family to which the elements $C$ and $F$ belong.
| Group $\to$ | $1$ | $2$ | $13$ | $14$ | $15$ | $16$ | $17$ | $18$ |
| Period $2$ | $A$ | - | - | - | $B$ | - | - | $C$ |
| Period $3$ | - | - | $D$ | $E$ | - | - | - | $F$ |
On the basis of the above table,answer the following questions:
$(i)$ Name the element which forms only covalent compounds.
$(ii)$ Name the element which is a metal with valency three.
$(iii)$ Name the element which is a non-metal with valency three.
$(iv)$ Out of $D$ and $E$,which is bigger in size and why?
$(v)$ Write the common name for the family to which the elements $C$ and $F$ belong.
(N/A) $(i)$ Element $E$ (Carbon group,valency $4$) forms only covalent compounds.
$(ii)$ Element $D$ is in Group $13$ (Period $3$),which is Aluminum $(Al)$. It is a metal with a valency of $3$.
$(iii)$ Element $B$ is in Group $15$ (Period $2$),which is Nitrogen $(N)$. It is a non-metal with a valency of $3$.
$(iv)$ $D$ is bigger in size than $E$. Across a period from left to right,the atomic size decreases due to an increase in effective nuclear charge.
$(v)$ Elements $C$ and $F$ belong to Group $18$,which are known as Noble gases.
$(ii)$ Element $D$ is in Group $13$ (Period $3$),which is Aluminum $(Al)$. It is a metal with a valency of $3$.
$(iii)$ Element $B$ is in Group $15$ (Period $2$),which is Nitrogen $(N)$. It is a non-metal with a valency of $3$.
$(iv)$ $D$ is bigger in size than $E$. Across a period from left to right,the atomic size decreases due to an increase in effective nuclear charge.
$(v)$ Elements $C$ and $F$ belong to Group $18$,which are known as Noble gases.
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Similar Questions
An element $X$ belongs to the $3rd$ period and group $16$ of the Modern Periodic Table.
$(a)$ Determine the number of valence electrons and the valency of $X$.
$(b)$ Write the molecular formula of the compound formed when $X$ reacts with hydrogen and draw its electron dot structure.
$(c)$ Name the element $X$ and state whether it is metallic or non-metallic.
$(a)$ Determine the number of valence electrons and the valency of $X$.
$(b)$ Write the molecular formula of the compound formed when $X$ reacts with hydrogen and draw its electron dot structure.
$(c)$ Name the element $X$ and state whether it is metallic or non-metallic.
Medium
View SolutionThe electronic configurations of $4$ elements $A, B, C,$ and $D$ are as follows:
$A: 2, 1$
$B: 2, 2$
$C: 2, 8, 2$
$D: 2$
$(a)$ Which of these elements belong to the same group? Name them.
$(b)$ Which of these elements belong to the same period? Name them.
$(c)$ Which of these elements is inert? Name it.
$A: 2, 1$
$B: 2, 2$
$C: 2, 8, 2$
$D: 2$
$(a)$ Which of these elements belong to the same group? Name them.
$(b)$ Which of these elements belong to the same period? Name them.
$(c)$ Which of these elements is inert? Name it.
Given below are four elements with their atomic numbers:
Element Atomic Number $A$ $16$ $B$ $11$ $C$ $3$ $D$ $14$
$(a)$ Identify the elements which belong to the same group of the Modern Periodic Table.
$(b)$ Arrange the given elements in decreasing order of atomic size.
$(c)$ Write the formula of the oxide of $B$.
$(d)$ Which of the above elements is a metalloid?
| Element | Atomic Number |
|---|---|
| $A$ | $16$ |
| $B$ | $11$ |
| $C$ | $3$ |
| $D$ | $14$ |
$(a)$ Identify the elements which belong to the same group of the Modern Periodic Table.
$(b)$ Arrange the given elements in decreasing order of atomic size.
$(c)$ Write the formula of the oxide of $B$.
$(d)$ Which of the above elements is a metalloid?
Medium
View SolutionThe atomic numbers of a few elements are given below: $10, 20, 7, 14$.
$(a)$ Identify the elements.
$(b)$ Identify the group number of these elements in the Periodic Table.
$(c)$ Identify the periods of these elements in the Periodic Table.
$(a)$ Identify the elements.
$(b)$ Identify the group number of these elements in the Periodic Table.
$(c)$ Identify the periods of these elements in the Periodic Table.
Medium
View SolutionCompare and contrast the arrangement of elements in Mendeleev's Periodic Table and the Modern Periodic Table.
Medium
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