Medium
Describe the theory associated with the radius of an atom as it:
$(a)$ gains an electron
$(b)$ loses an electron
$(a)$ gains an electron
$(b)$ loses an electron
(N/A) When an atom gains an electron,it forms an anion. The addition of an electron increases the interelectronic repulsion,while the nuclear charge remains constant. This causes the electron cloud to expand,leading to an increase in the ionic radius compared to the atomic radius.
$(b)$ When an atom loses an electron,it forms a cation. The removal of an electron decreases the interelectronic repulsion,while the nuclear charge remains constant. This results in a stronger pull by the nucleus on the remaining electrons,leading to a decrease in the ionic radius compared to the atomic radius.
$(b)$ When an atom loses an electron,it forms a cation. The removal of an electron decreases the interelectronic repulsion,while the nuclear charge remains constant. This results in a stronger pull by the nucleus on the remaining electrons,leading to a decrease in the ionic radius compared to the atomic radius.
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Consider the following species: $N^{3-}, O^{2-}, F^{-}, Na^{+}, Mg^{2+}$ and $Al^{3+}$
$(a)$ What is common in them?
$(b)$ Arrange them in the order of increasing ionic radii.
$(a)$ What is common in them?
$(b)$ Arrange them in the order of increasing ionic radii.
Medium
View SolutionThe correct order of covalent radii of $Si$,$Ge$,and $Sn$ is:
Given below are two statements:
Statement $I$: The metallic radius of $Na$ is $1.86 \ \mathring{A}$ and the ionic radius of $Na^{+}$ is lesser than $1.86 \ \mathring{A}$.
Statement $II$: Ions are always smaller in size than the corresponding elements.
In the light of the above statements,choose the correct answer from the options given below:
Statement $I$: The metallic radius of $Na$ is $1.86 \ \mathring{A}$ and the ionic radius of $Na^{+}$ is lesser than $1.86 \ \mathring{A}$.
Statement $II$: Ions are always smaller in size than the corresponding elements.
In the light of the above statements,choose the correct answer from the options given below:
In which of the following pairs is the difference between the covalent radii of the two metals maximum?
Easy
View SolutionIf four elements with atomic numbers $Z-2$,$Z-1$,$Z$ and $Z+1$ are forming isoelectronic ions,the atomic number of the ion having largest size is
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