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प्रश्न
Answer the following.
Why do the elements belonging to the same group have similar chemical properties?
Why do the elements of same group have similar chemical properties?
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उत्तर
- Chemical properties of elements depend upon their valency.
- Elements belonging to the same group have the same valency.
Hence, the elements belonging to the same group show similar chemical properties.
संबंधित प्रश्न
Explain the following.
The atomic radii of Cl, I, and Br are 99, 133, and 114 pm, respectively.
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13Al is a metal, 14Si is a metalloid and 15P is a nonmetal.
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Cu forms coloured salts while Zn forms colourless salts.
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Ionization enthalpy of Li is 520 kJ mol-1 while that of F is 1681 kJ mol-1. Explain.
Answer the following.
Why the second ionization enthalpy is greater than the first ionization enthalpy?
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Explain electronegativity and electron gain enthalpy. Which of the two can be measured experimentally?
Choose the correct option.
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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:
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Answer the following question.
Select the smaller ion form the following pair:
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With the help of a diagram answer the questions are given below:
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- The lithium forms +1 ions while beryllium forms +2 ions?
Define ionic radius
Define electronegativity
Define ionization enthalpy.
Name the factors on which ionization enthalpy depends?
How the atomic size vary in a group and across a period? Explain with suitable example.
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.
