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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Give a Reason Why – Ozone is Considered Triatomic, but Phosphorus a Tetratomic Molecule.

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प्रश्न

Give a reason why –

Ozone is considered triatomic, but phosphorus a tetratomic molecule.

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एका वाक्यात उत्तर
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उत्तर

Ozone is considered triatomic because it is composed of three atoms while phosphorous is composed of four elements therefore it considered as tetratomic molecule.

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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


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Quick lime


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

Hydrogen bromide


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

Baking powder


Calculate the number of molecules of sulphur (S8) present in 16 g of solid sulphur.


State the term.

The number of atoms present in a molecule of an element _________


Define: Atomic number


 Define: Atomic number


What is meant by atomicity ? Explain with two examples.


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

In what form do noble gases occur in nature?


What do the following denote ?

  1. N
  2. 2N
  3. N2
  4. 2N2

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


Work out the formula for magnesium hydrogencarbonate.


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


The cation of an element has :


An element A forms an oxide A2O5.

What is the valency of element A ?


Correct the following statement:

A molecule of sulphur is monoatomic.


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 polyatomic molecule.


State the atomicity of the following:

Argon


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.


Derive the relationship between Relative molecular mass and Vapour density.


Which of the following contains maximum number of molecules?


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