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प्रश्न
There are ______ number of known elements.
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उत्तर
There are 118 number of known elements.
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संबंधित प्रश्न
Fill in the blank
Use of a ................. to separate the components of a mixture of solids is based on the difference in the size of the components
Give two examples of Noble gases.
Mention three gaseous elements and write their molecular formulae
Give reason: Argon is filled in electric bulbs.
Tick (√) the correct alternative from the choice given for the following statement.
Sugar is a compound which consists of the elements
Select the correct answer from the choice given below.
A group of atoms of elements
Select the correct answer from the choice given below to complete the sentence :
Dust in air is an example of _________ mixture.
Atoms: Fundamental particle of an element::______ : Fundamental particles of a compound.
Classify the following as metals, non-metals and metalloids.
Sodium, Bismuth, Silver, Nitrogen, Silicon, Carbon, Chlorine, Iron, Copper
Give two example of elements.
