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प्रश्न
Define ionic radius
उत्तर
Ionic radius is defined as the distance of the valence shell of electrons from the centre of the nucleus in an ion.
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संबंधित प्रश्न
Explain the following.
The atomic radii of Cl, I, and Br are 99, 133, and 114 pm, respectively.
Explain the following.
The ionic radii of FΘ and Na⊕ are 133 and 98 pm, respectively.
Answer the following.
Explain the screening effect with a suitable example.
Answer the following.
Why the second ionization enthalpy is greater than the first ionization enthalpy?
Answer the following.
Why the elements belonging to the same group do have similar chemical properties?
Answer the following.
Explain electronegativity and electron gain enthalpy. Which of the two can be measured experimentally?
Choose the correct option.
The lanthanides are placed in the periodic table at
Choose the correct option.
If the valence shell electronic configuration is ns2np5, the element will belong to
Answer the following question.
For the following pair, indicate which of the two species is of large size:
Fe2+ or Fe3+
Answer the following question.
Select the smaller ion form the following pair:
K+, Li+
Define electronegativity
What are the valence electrons?
Define ionization enthalpy.
Name the factors on which ionization enthalpy depends?
How does ionization enthalpy vary down the group and across a period?
Give reason.
Alkali metals have low ionization enthalpies.
Give reason.
Inert gases have exceptionally high ionization enthalpies.
Give reason.
Noble gases possess relatively large atomic size.
