हिंदी

Complete the following chart.

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प्रश्न

Complete the following chart.

Shell n 2n2 Electron holding
capacity
K ______ 2 × 12 2
L 2 ______ 8
______ 3 2 × 32 18
N 4 2 × 42 ______
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उत्तर

Shell n 2n2 Electron holding
capacity
K 1 2 × 12 2
L 2 2 × 22 8
M 3 2 × 32 18
N 4 2 × 42 32
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अध्याय 2: Periodic Classication of Element - Solve the following Questions

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संबंधित प्रश्न

Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
3Li, 14Si, 2He, 11Na, 15P Which of these elements belong to be period 3?


Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.

7N, 6C, 8O, 5B, 13Al Which is the most electronegative element among these?


Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with an explanation.

13Al, 14Si, 11Na, 12Mg, 16S

Which of the above elements has the highest metallic character?


Write the scientific reason.

The third period contains only eight elements even though the electron capacity of the third shell is 18


An element has its electron configuration as 2,8,2. Now answer the following questions.
i. What is the atomic number of this element?
ii. What is the valency of this element?
iii. What is the group of this element?
iv. To which period does this element belong?
v. With which of the following elements would this element resemble?

`_7N ,  _4Be  ,  _18Ar  , _17CL`


Which of this element belong to the period 3? Write their electronic configuration

`3^(Li) , 14^(Si) , 2^(He) , 15^(P)`


_______ is the outermost shell for elements of period 2.


Which pair of atomic numbers represents elements in the same group?


Find the odd one out and give its explanation.


What determines the chemical reactivity of elements?


Match the columns.

Column A Column B
1) s -block a) Lanthanides and actinides
2) p -block b) Group 3 to 12
3) d -block c) Group 1, 2
4) f -block d) Group 13 to 18
  e) Zero group

Write the name.

Highest electropositive element


Write the name.

The group of elements having electronic configuration 2, 2.


The valency of the elements in group 2 is 1.


Write scientific reason.

Boron and oxygen elements are placed in the second period in periodic table.


Distinguish between:

Group - Period


Write name of elements, symbol, atomic number, electronic configuration of second period in modern periodic table?


Identify periods of elements and blocks of elements from given electronic configuration?

  1. 2, 8, 2
  2. 2, 8, 7
  3. 2, 1

An element has its electron configuration as 2, 8, 1. Now answer the following questions:

  1. What is the atomic number of this element?
  2. What is the group of this element?
  3. To which period does this element belong?

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