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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

State the Atomicity of the Following: Chlorine - Chemistry

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प्रश्न

State the atomicity of the following:

Chlorine

एक शब्द/वाक्यांश उत्तर
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उत्तर

Diatomic

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पाठ 4: Atomic Structure - Exercise

संबंधित प्रश्‍न

Write down the name of a compound represented by the following formula:

Al2(SO4)3


Write down the name of a compound represented by the following formula:

KNO3


Give the name of the element present in the following compound: 

Baking powder


 Define: Atomic number


Define: Mass number : 


Define: Atomic weight :


Write the formulae of the following compounds. Also name the elements present in them.

  1. Water
  2. Ammonia
  3. Methane
  4. Sulphur dioxide
  5. Ethanol

What is the difference between the molecule of an element and the molecule of a compound ? Give one
example of each.


One of the forms of a naturally occurring solid compound P is usually used for making the floors of houses. On adding a few drops of dilute hydrochloric acid to P, brisk effervescence are produced. When 50 g of reactant P was heated strongly, than 22 g of a gas Q and 28 g of a solid R were produced as products. Gas Q is the same which produced brisk effervescence on adding dilute HCl to P. Gas Q is said to cause global warming whereas solid R is used for white-washing.

  1. What is (i) solid P (ii) gas Q, and (iii) solid R.
  2. What is the total mass of Q and R obtained from 50 g of P ?
  3. How does the total mass of Q and R formed compare with the mass of P taken ?
  4. What conclusion do you get from the comparison of masses of products and reactant ?
  5. Which law of chemical combination is illustrated by the example given in this problem ?

Work out the formula for magnesium hydrogencarbonate.


What are (i) ionic compounds, and (ii) molecular compounds ? Give two examples of each type of compounds.


Molecular compounds are usually formed by the combination between :


An element X forms the following compounds with hydrogen, carbon and oxygen :

H2X, CX2, XO2, XO3

State the three valencies of element X which are illustrated by these compounds.


Correct the following statement:

A molecule of sulphur is monoatomic.


Why are the symbols and formulae of substances important?


Explain the term – molecules. Give three examples of atoms of the same element forming a molecule. State the atomicity of the same.


Give one example of a triatomic molecule


Give one example of a polyatomic molecule.


State the main points of the contradiction of Dalton’s atomic theory by the Modern Atomic Theory.


State true of false. If false, give the correct statement.

NaCl represents one molecule of sodium chloride.


Classify the following molecules as the molecules of element or compound

1.  
2.  
3.  
4.  

If a molecule is made of similar kinds of atoms, then it is called ______ atomic molecule.


The Atomicity of phosphorous is ______


Two elements sometimes can form more than one compound.


Give any two examples for heterodiatomic molecules.


Derive the relationship between Relative molecular mass and Vapour density.


Which of the following contains maximum number of molecules?


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