Class 10SciencePeriodic Classification of ElementsMix Examples - Periodic Classification of Elements
EasyWrite the atomic numbers of two elements $X$ and $Y$ having electronic configurations $2, 8, 2$ and $2, 8, 6$ respectively.
(N/A) The atomic number of an element is equal to the total number of electrons present in its neutral atom.
For element $X$,the electronic configuration is $2, 8, 2$. The total number of electrons is $2 + 8 + 2 = 12$. Therefore,the atomic number of $X$ is $12$.
For element $Y$,the electronic configuration is $2, 8, 6$. The total number of electrons is $2 + 8 + 6 = 16$. Therefore,the atomic number of $Y$ is $16$.
For element $X$,the electronic configuration is $2, 8, 2$. The total number of electrons is $2 + 8 + 2 = 12$. Therefore,the atomic number of $X$ is $12$.
For element $Y$,the electronic configuration is $2, 8, 6$. The total number of electrons is $2 + 8 + 6 = 16$. Therefore,the atomic number of $Y$ is $16$.
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Similar Questions
Which of the following elements does not lose an electron easily?
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 SolutionName any two pairs of elements which were adjusted by Newlands in the same slot.
Easy
View SolutionAn element which is an essential constituent of all organic compounds belongs to :
Easy
View SolutionWhich of the following statements about the Modern Periodic Table is correct?
Easy
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