Advertisements
Advertisements
प्रश्न
Explain the following.
The ionic radii of FΘ and Na⊕ are 133 and 98 pm, respectively.
Advertisements
उत्तर
- FΘ and Na⊕ are isoelectronic ions as they both have 10 electrons.
- However, the nuclear charge on FΘ is +9 while that of Na⊕ is +11.
- In isoelectronic species, a larger nuclear charge exerts a greater attraction on the electrons and thus, the radius of that isoelectronic species becomes smaller.
- Thus, FΘ has a larger ionic radii (133 pm) than Na⊕ (98 pm).
APPEARS IN
संबंधित प्रश्न
Explain the following.
The atomic radii of Cl, I, and Br are 99, 133, and 114 pm, respectively.
Explain the following.
Cu forms coloured salts while Zn forms colourless salts.
Answer the following.
Ionization enthalpy of Li is 520 kJ mol-1 while that of F is 1681 kJ mol-1. Explain.
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.
Consider the elements B, Al, Mg, and K predict the correct order of metallic character:
Choose the correct option.
Which of the following pairs is isoelectronic?
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.
For the following pair, indicate which of the two species is of large size:
Mg2+ or Ca2+
Answer the following question.
Select the smaller ion form the following pair:
K+, Li+
Answer the following question.
Select the smaller ion form the following pair:
N3–, F–
With the help of a diagram answer the questions are given below:
- Which atom should have smaller ionization energy, oxygen, or sulphur?
- The lithium forms +1 ions while beryllium forms +2 ions?
Define ionic radius
Define electronegativity
What are the valence electrons?
Define ionization enthalpy.
Name the factors on which ionization enthalpy depends?
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.
