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Choose the correct option. The lanthanides are placed in the periodic table at - Chemistry

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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

MCQ

उत्तर

The lanthanides are placed in the periodic table at bottom

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Periodic Trends in Elemental Properties
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 7: Modern Periodic Table - Exercises [पृष्ठ १०९]

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बालभारती Chemistry [English] 11 Standard
अध्याय 7 Modern Periodic Table
Exercises | Q 4. (C) | पृष्ठ १०९

संबंधित प्रश्न

Explain the following.

The ionic radii of FΘ and Naare 133 and 98 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?


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


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:

  1. Which atom should have smaller ionization energy, oxygen, or sulphur?
  2. The lithium forms +1 ions while beryllium forms +2 ions?

What are the valence electrons?


Define ionization enthalpy.


How does ionization enthalpy vary down the group and across a period?


How the atomic size vary in a group and across a period? Explain with suitable example.


Give reason.

Alkali metals have low ionization enthalpies.


Give reason.

Fluorine has less electron affinity than chlorine.


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