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प्रश्न
Oxygen is very essential for us to live. It forms 21% of air by volume. Is it an element or compound?
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उत्तर
Oxygen is an element. It contains the atoms of oxygen of the same kind.
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संबंधित प्रश्न
Give two examples of the following.
Non-metals which are lustrous
Define: Molecule
Name: A form of carbon used as a gem
Indicate whether the following statement is true or false:
Metals can be polished.
Tick (√) the correct alternative from the choice given for the following statement
A metal which is brittle
Write the names of elements from the following symbol:
Si
Give a reason for the following statement:
Components in a mixture are present in varying proportions and not in a fixed proportion.
There are ______ number of known elements.
Atoms: Fundamental particle of an element::______ : Fundamental particles of a compound.
Classify the following as elements and compounds.
Water, Common salt, Sugar, Carbon dioxide, Iodine and Lithium
