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Complete the following chart. Shell K L N n 2 3 4 2n2 2 × 12 2 × 32 2 × 42 Electron holding capacity 2 8 18

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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 [पृष्ठ २६]

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एससीईआरटी महाराष्ट्र Science and Technology Part 1 [English] Standard 10 Maharashtra State Board
अध्याय 2 Periodic Classication of Element
Solve the following Questions | Q 5. | पृष्ठ २६

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 an explanation.

13Al, 14Si, 11Na, 12Mg, 16S

Which of the above elements has the highest metallic character?


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

 6C, 3Li, 9F, 7N, 8O Which of the above elements has the highest nonmetallic 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 pair of atomic numbers represents elements in the same group?


Which among the following elements would lose an electron easily?


Which among the following is the largest element?


Find the odd one out and give its explanation.


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

Match the columns.

Column A
Electronic
configuration
Column B
Valency
1) 2, 2 a) 1
2) 2, 8, 1 b) 2
3) 2, 5 c) 3
  d) 5

The number of electrons in the outermost shell of an atom determines the ______.


Write the name.

The element having stable electron configuration from the third period.


Write the name.

The group of elements having electronic configuration 2, 2.


Right or wrong sentence.

The valency of the elements in group 2 is 1.


Write an explanation.

Group


Find the period in which these elements can be placed.

4Be, 17Cl, 2He, 13Al


Observe the given chart and answer the questions given below.

Element A B C D
Electronic configuration 2, 1 2, 8 2, 8, 1 2, 8, 8
  1. Which elements are in the same row?
  2. Which elements have the same column?
  3. Which elements are in the 18th column?
  4. Which element is more reactive among A and C?
  5. Which of the following elements A or B will form compounds?

XY compound is formed by X (Atomic number 11) and Y (Atomic number 17), then answer the questions given below.

  1. Determine the position of the element X and Y periodic table.
  2. Which type of elements X and Y are metals, nonmetals or metalloids?
  3. From which block the elements X and Y are?
  4. Determine the electronic configuration and valency of these elements.

Observe the periodic table given below and write the answers of the questions.

  1. Write the name and valencies of the elements in 3rd row.
  2. Classify the elements in this row as metal, nonmetal and metalloids.
  3. Which block does nonmetals belong to?
  4. Write name of any two metalloid elements.

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