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प्रश्न
In what form do noble gases occur in nature?
उत्तर
Noble gases occur in nature as a monoatomic gas.
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संबंधित प्रश्न
Give the name of the element present in the following compound:
Hydrogen bromide
Define: Atomic number
Define: Atomic number
Write the formulae of the following compounds. Also name the elements present in them.
- Water
- Ammonia
- Methane
- Sulphur dioxide
- Ethanol
An element A forms an oxide A2O5.
What is the valency of element A ?
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.
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:
Sulphur
Classify the following molecules as the molecules of element or compound
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