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प्रश्न
Choose the correct option.
The lanthanides are placed in the periodic table at
विकल्प
left-hand side
right-hand side
middle
bottom
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उत्तर
The lanthanides are placed in the periodic table at bottom
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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.
Explain the following.
13Al is a metal, 14Si is a metalloid and 15P is a nonmetal.
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.
Choose the correct option.
Consider the elements B, Al, Mg, and K predict the correct order of metallic character:
Choose the correct option.
If the valence shell electronic configuration is ns2np5, the element will belong to
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–
Define ionic radius
Define electronegativity
What are the valence electrons?
Define ionization enthalpy.
How does ionization enthalpy vary down the group and across a period?
Give reason.
Inert gases have exceptionally high ionization enthalpies.
Give reason.
Fluorine has less electron affinity than chlorine.
Give reason.
Noble gases possess relatively large atomic size.
