मराठी

Why is the size of neon greater than fluorine?

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प्रश्न

Why is the size of neon greater than fluorine?

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उत्तर

The size of Neon is bigger compared to fluorine because the outer shell of neon is complete (octet). As a result, the effect of nuclear pull over the valence shell electrons cannot be seen. Hence the size of Neon is greater than fluorine.

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पाठ 1: Periodic Table, Periodic Properties and Variations of Properties - lntext Questions [पृष्ठ १०]

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एस.पी. सिंह Concise Chemistry [English] Class 10 ICSE
पाठ 1 Periodic Table, Periodic Properties and Variations of Properties
lntext Questions | Q 4. (i) | पृष्ठ १०

संबंधित प्रश्‍न

Which is greater in size Fe2+ or Fe3+?


Give reason for the following:

Argon atom is bigger than chlorine atom. 


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


With reference to the variation of properties in the Periodic Table, which of the following is generally true?
Atomic size increases from left to right across a period.


Write scientific reason.

In same period, boron and oxygen elements have different atomic size.


Some elements and their atomic radii are given here. Arrange them in decreasing order of their atomic radii. Identify which of the above elements is the biggest atom and which is smallest?

Element K Na Rb Cs Li
Atomic radius (pm) 231 186 244 262 151

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

Atomic number of a few elements are given below
10, 20, 7, 14

  1. Identify the elements
  2. Identify the Group number of these elements in the Periodic Table
  3. Identify the Periods of these elements in the Periodic Table
  4. What would be the electronic configuration for each of these elements?
  5. Determine the valency of these elements

  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.

Arrange the following as per the instruction given in the bracket:

Carbon, Fluorine, Beryllium (decreasing order of atomic size).


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