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प्रश्न
Define: Atomic weight :
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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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संबंधित प्रश्न
Write down the name of a compound represented by the following formula:
CaCl2
Write down the name of a compound represented by the following formula:
KNO3
Write down the name of a compound represented by the following formula:
CaCO3
Give the name of the element present in the following compound:
Quick lime
Give the name of the element present in the following compound:
Baking powder
Define: Atomic number
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
What is the difference between the molecule of an element and the molecule of a compound ? Give one
example of each.
Calculate the mass of 3.011 × 1024 atoms of carbon.
Why are the symbols and formulae of substances important?
Give a reason why –
Helium is considered monoatomic, but hydrogen a diatomic molecule.
State the atomicity of the following:
Neon
State the atomicity of the following:
Oxygen
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. |  |
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| 2. |  |
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| 3. |  |
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| 4. |  |
Which of the following is a triatomic molecule?
The Atomicity of phosphorous is ______
Two elements sometimes can form more than one compound.
Derive the relationship between Relative molecular mass and Vapour density.
Write any two classifications of a molecule.
