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प्रश्न
Give a reason why –
Ozone is considered triatomic, but phosphorus a tetratomic molecule.
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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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संबंधित प्रश्न
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: Mass number :
What is meant by atomicity ? Explain with two examples.
Write the formulae of the following compounds. Also name the elements present in them.
- Water
- Ammonia
- Methane
- Sulphur dioxide
- Ethanol
In what form does oxygen gas occur in nature ?
In what form do noble gases occur in nature?
What is the difference between the molecule of an element and the molecule of a compound ? Give one
example of each.
The cation of an element has :
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.
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A molecule of sulphur is monoatomic.
Why are the symbols and formulae of substances important?
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Give a reason why –
Helium is considered monoatomic, but hydrogen a diatomic molecule.
State the atomicity of the following:
Oxygen
State the atomicity of the following:
Chlorine
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Two elements sometimes can form more than one compound.
Define: Atomicity.
Derive the relationship between Relative molecular mass and Vapour density.
Which of the following contains maximum number of molecules?
