Class 10SciencePeriodic Classification of ElementsMix Examples - Periodic Classification of Elements
MediumThe following table shows elements represented by the letters $A, B, C, D, E, F, G$ and $H$.
Group $1$ $2$ $13$ $14$ $15$ $16$ $17$ $18$ Element $A$ $B$ $C$ $D$ $E$ $F$ $G$ $H$
$(i)$ Which of the elements has the atomic size:
$(a)$ biggest and $(b)$ smallest?
$(ii)$ Which element has valency:
$(a)$ $3$ and $(b)$ zero?
| Group | $1$ | $2$ | $13$ | $14$ | $15$ | $16$ | $17$ | $18$ |
| Element | $A$ | $B$ | $C$ | $D$ | $E$ | $F$ | $G$ | $H$ |
$(i)$ Which of the elements has the atomic size:
$(a)$ biggest and $(b)$ smallest?
$(ii)$ Which element has valency:
$(a)$ $3$ and $(b)$ zero?
(A) $(i)$ Atomic size decreases across a period from left to right. Therefore,the element on the extreme left $(A)$ has the biggest atomic size,and the element on the extreme right (excluding noble gases,but here $G$ is in group $17$) has the smallest atomic size.
$(a)$ Biggest: $A$
$(b)$ Smallest: $G$
$(ii)$ Valency is determined by the number of valence electrons. Elements in group $13$ have $3$ valence electrons (valency $3$). Elements in group $18$ are noble gases with a stable octet (valency $0$).
$(a)$ Valency $3$: $C$
$(b)$ Valency $0$: $H$
$(a)$ Biggest: $A$
$(b)$ Smallest: $G$
$(ii)$ Valency is determined by the number of valence electrons. Elements in group $13$ have $3$ valence electrons (valency $3$). Elements in group $18$ are noble gases with a stable octet (valency $0$).
$(a)$ Valency $3$: $C$
$(b)$ Valency $0$: $H$
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Similar Questions
The element $X$ has the following electron configuration $2, 8, 8, 2$. It means that it belongs to:
Medium
View SolutionThe position of some elements $A, B, C, D, E, F$ and $G$ in the Modern Periodic Table is given as under:
Group $\to$ $16$ $17$ $18$ Period $1$ $A$ Period $2$ $B$ $C$ $D$ Period $3$ $E$ $F$ $G$
$(a)$ In which group are inert elements placed?
$(b)$ What type of ions would $B, C, E,$ and $F$ form?
$(c)$ Which element would have chemical properties similar to $C$?
$(d)$ How many shells would $A$ have?
$(e)$ What is the similarity between $A$ and $D$?
$(f)$ Identify the most abundant element in the earth's crust.
| Group $\to$ | $16$ | $17$ | $18$ |
| Period $1$ | $A$ | ||
| Period $2$ | $B$ | $C$ | $D$ |
| Period $3$ | $E$ | $F$ | $G$ |
$(a)$ In which group are inert elements placed?
$(b)$ What type of ions would $B, C, E,$ and $F$ form?
$(c)$ Which element would have chemical properties similar to $C$?
$(d)$ How many shells would $A$ have?
$(e)$ What is the similarity between $A$ and $D$?
$(f)$ Identify the most abundant element in the earth's crust.
Medium
View SolutionIn Mendeleev's Periodic Table,gaps were left for elements to be discovered later. Which of the following elements found a place in the periodic table later?
Easy
View SolutionStudy 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.
Difficult
View SolutionIt was found that the law of octaves was applicable only up to:
Easy
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