Class 10SciencePeriodic Classification of ElementsMix Examples - Periodic Classification of Elements
MediumWhich group of elements could be placed in Mendeleev's Periodic Table without disturbing the original order? Give reason.
(A) The group of elements that could be placed in Mendeleev's Periodic Table without disturbing the original order is the Noble gases.
Reason:
$1$. Mendeleev's periodic law states that the properties of elements are a periodic function of their atomic masses.
$2$. Noble gases are chemically inert and possess very low reactivity due to their stable electronic configuration.
$3$. Because they do not react with other elements,they could be placed in a separate group (Group $0$ or $VIII$) without requiring any changes to the positions of the existing elements in the table.
Reason:
$1$. Mendeleev's periodic law states that the properties of elements are a periodic function of their atomic masses.
$2$. Noble gases are chemically inert and possess very low reactivity due to their stable electronic configuration.
$3$. Because they do not react with other elements,they could be placed in a separate group (Group $0$ or $VIII$) without requiring any changes to the positions of the existing elements in the table.
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Similar Questions
$(a)$ State Modern Periodic Law.
$(b)$ Elements $A, B, C$ and $D$ have atomic numbers $1, 8, 11$ and $19$ respectively. Choose the odd element and give reason for your answer.
$(b)$ Elements $A, B, C$ and $D$ have atomic numbers $1, 8, 11$ and $19$ respectively. Choose the odd element and give reason for your answer.
Easy
View Solution$(a)$ Predict which of the following will form anions and which will form cations:
$(i)$ $Na$ $(ii)$ $Al$ $(iii)$ $Cl$ $(iv)$ $O$
$(b)$ Name two elements that are inert.
$(i)$ $Na$ $(ii)$ $Al$ $(iii)$ $Cl$ $(iv)$ $O$
$(b)$ Name two elements that are inert.
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 SolutionState the reason for the following:
$(a)$ The elements of the same group have similar chemical properties.
$(b)$ The elements of the same period have different properties.
$(a)$ The elements of the same group have similar chemical properties.
$(b)$ The elements of the same period have different properties.
Easy
View SolutionWrite true or false for the statement: In Mendeleev's periodic table,elements were arranged in the order of their increasing atomic masses and it was also observed that there occurs a periodic recurrence of elements with similar physical and chemical properties.
Easy
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