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प्रश्न
Define: Mass number :
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उत्तर
Mass number : Numbr of protons and neutrons present in the nucleus of an atom.
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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:
K2SO4
Write down the name of a compound represented by the following formula:
CaCO3
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
What is the atomicity of the following ?
- Oxygen
- Ozone
- Neon
- Sulphur
- Phosphorus
- Sodium
What do the following denote ?
- N
- 2N
- N2
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What is the difference between the molecule of an element and the molecule of a compound? Give one example of each.
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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.
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Give a reason why –
Ozone is considered triatomic, but phosphorus a tetratomic molecule.
State the atomicity of the following:
Neon
Which of the following is a short and scientific way of representing one molecule of an element or compound?
Which of the following is a triatomic molecule?
If a molecule is made of similar kinds of atoms, then it is called ______ atomic molecule.
Define: Atomicity.
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?
