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प्रश्न
In what form does oxygen gas occur in nature ?
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उत्तर
Naturally, oxygen has diatomic molecules. Two oxygen atoms chemically combine with each other to give a molecule of O2.
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संबंधित प्रश्न
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:
CaCl2
Give the name of the element present in the following compound:
Potassium sulphate
Define: Mass number :
What is meant by atomicity ? Explain with two examples.
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
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. |  |
Two elements sometimes can form more than one compound.
