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सी.आई.एस.सी.ई.आईसीएसई ICSE Class 7

Define : Atomic Weight :

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प्रश्न

Define: Atomic weight :

परिभाषा
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उत्तर

Atomic weight : It is the ratio that tells how many times an atom of an element is heavier than atom of Hydrogen

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अध्याय 4: Atomic Structure - Additional questions

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एस पी सिंग Concise Chemistry [English] Class 7 ICSE
अध्याय 4 Atomic Structure
Additional questions | Q 21.4

संबंधित प्रश्न

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

KNO3


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

Hydrogen bromide


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


Define: Atomic number


 Define: Atomic number


What is meant by atomicity ? Explain with two examples.


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


An element A forms an oxide A2O5.

What is the valency of element A ?


Calculate the mass of 3.011 × 1024 atoms of carbon.


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 triatomic molecule


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


Give a reason why –

Helium is considered monoatomic, but hydrogen a diatomic molecule.


Give a reason why –

Ozone is considered triatomic, but phosphorus a tetratomic molecule.


State the atomicity of the following:

Neon


State the atomicity of the following:

Chlorine


State the atomicity of the following:

Sulphur


Which of the following is a short and scientific way of representing one molecule of an element or compound?


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.  

Which of the following is a triatomic molecule?


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


Give any two examples for heterodiatomic molecules.


Write any two classifications of a molecule.


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