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Arrange the Following as per Instruction Given in the Bracket. Cs, Na, Li, K, Rb (Decreasing Electronegativity) - Chemistry

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प्रश्न

Arrange the following as per instruction given in the bracket.

Cs, Na, Li, K, Rb (decreasing electronegativity) 

टीपा लिहा

उत्तर

Cs, Na, Li, K, Rb (decreasing electronegativity)

Li > Na > K = Rb > Cs

 1.0 > 0.9 > 0.8 = 0.8 > 0.7

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पाठ 1: Periodic Table, Periodic Properties and Variations of Properties - Exercise 1 [पृष्ठ १७]

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सेलिना Concise Chemistry [English] Class 10 ICSE
पाठ 1 Periodic Table, Periodic Properties and Variations of Properties
Exercise 1 | Q 2.5 | पृष्ठ १७

संबंधित प्रश्‍न

Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the periodic table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?


For each of the following triads, name the element with the characteristics specified below:

Elements Least atomic radius Chemically least reactive
(i) F, Cl, Br
(ii) Li, Na, K
....................
....................
....................
....................

 


Periodicity is observed due to the similar ______.


An element barium has atomic number 56. Look up its position in the periodic table and answer the following question.

Is it more or less reactive than calcium?


K, Pb, Ca, Zn (In the increasing order of the reactivity) 


Select the correct answer
Number of shells in potassium are


The following table represents the first period of the modern periodic table. Study the  table and answer the questions that follow:

(i) Write the formula of the sulphate of the element with atomic number 13.
(ii) What type of bonding will be present in the oxide of the element with atomic number 1?
(iii) Which feature of the atomic structure accounts for the similarities in the chemical properties of the elements in group VIIA of the periodic table?
(iv) Name the element which has the highest ionization potential.
(v) How many electrons are present in the valence shell of the element with atomic number 18?
(vi) What is the name given to the energy released, when an atom in its isolated gaseous state accepts an electron to form an anion?
(vii) What is the electronic configuration of the element in the third period which gains one electron to become an anion?
(viii) Fill in the blanks:
The atomic size ______ as we move from left to right across the period, because the ______ increases, but the ______ remains the same.


Give the number of the group and the period of elements having three shells with three electrons in valence shell.


(a) Fill in the blanks and rewrite the completed statements: 

(i) ________ group in the periodic table contains elements that are all gases at room temperature. 

(ii) Very fine particles mainly scatter ______ light.


Give a reason for the following:

A transition from metallic to non-metallic elements is seen on moving from left to right in a period of the periodic table.


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