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महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता ११ वी

Choose the correct option. Which of the following pairs is isoelectronic? - Chemistry

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प्रश्न

Choose the correct option.

Which of the following pairs is isoelectronic?

पर्याय

  • Naand Na

  • Mg2⊕ and Ne

  • Al3⊕ and B3⊕

  • P and N

MCQ
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उत्तर

Mg2⊕ and Ne

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Notes

There is a mistake in the textbook question.

Periodic Trends in Elemental Properties
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 7: Modern Periodic Table - Exercises [पृष्ठ १०९]

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बालभारती Chemistry [English] Standard 11 Maharashtra State Board
पाठ 7 Modern Periodic Table
Exercises | Q 4. (G) | पृष्ठ १०९

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 Naare 133 and 98 pm, respectively.


Explain the following.

13Al is a metal, 14Si is a metalloid and 15P is a nonmetal.


Answer the following.

Explain the screening effect with a suitable example.


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:


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:

  1. Which atom should have smaller ionization energy, oxygen, or sulphur?
  2. 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?


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.


Give reason.

Noble gases possess relatively large atomic size.


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