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महाराष्ट्र राज्य शिक्षण मंडळएस.एस.सी (इंग्रजी माध्यम) इयत्ता १० वी

Write information about the given atomic numbers in the table. 10, 20, 7. - Science and Technology 1

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प्रश्न

Write information about the given atomic numbers in the table. 10, 20, 7.

Atomic Number Electronic configuration Group Period Element
10        
20        
7        
टीपा लिहा

उत्तर

Atomic Number Electronic configuration Group Period Element
10 2, 8 18 2 Neon (Ne)
20 2, 8, 8, 2 2 4 Calcium (Ca)
7 2, 5 15 2 Nitrogen (N)
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पाठ 2: Periodic Classication of Element - Answer the Following

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संबंधित प्रश्‍न

What do you understand by atomic size? State its unit?


Give the trends in atomic size on moving down the group.


Which is greater in size an atom or a cation?


Which is greater in size an atom or an anion?


Write the name and symbol of the element from the description.

The atom having the smallest size.


Write the name and symbol of the element from the description.

The atom having the smallest atomic mass.


Give scientific reasons for the following:

Atomic radius goes on decreasing while going from left to right in a period.


Write scientific reason.
Atomic radius goes on increasing down a group.


Among the elements of the second period, Li to Ne, pick out the element with the largest atomic size


Arrange the following in increasing order of property indicated
 I, I+, I- (atomic size)


Select the correct answer
Atomic radii of fluorine and neon in angstrom unit are


The size of an atom is indicated by its _______.


_______ is the distance between the nucleus of the atom and its outermost shell.


An element X has mass number 40 and contains 21 neutrons in its atom. To which group of the Periodic Table does it belong?


Which among the following elements has the largest atomic radii?


Write the formula of the product formed when the element A (atomic number 19) combines with the element B (atomic number 17). Draw its electronic dot structure. What is the nature of the bond formed?


An element X (atomic number 17) reacts with an element Y (atomic number 20) to form a divalent halide.

  1. Where in the periodic table are elements X and Y placed?
  2. Classify X and Y as metal (s), non-metal (s) or metalloid (s)
  3. What will be the nature of oxide of element Y? Identify the nature of bonding in the compound formed
  4. Draw the electron dot structure of the divalent halide

  1. Electropositive nature of the element(s) increases down the group and decreases across the period
  2. Electronegativity of the element decreases down the group and increases across the period
  3. Atomic size increases down the group and decreases across a period (left to right)
  4. Metallic character increases down the group and decreases across a period.

On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9.

  1. Name the most electropositive element among them
  2. Name the most electronegative element
  3. Name the element with smallest atomic size
  4. Name the element which is a metalloid
  5. Name the element which shows maximum valency.

Which one of the following has the largest atomic radius?


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