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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
Indicate whether the following statement is true or false:
Ozone is a triatomic molecule
Tick (√) the correct alternative from the choice given for the following statement.
Sand is a compound of
Classify substances into pure and impure substances in the form of a chart or tabulation.
Write the names of elements from the following symbol:
Cu
Select the correct answer to the statement given below:
A metalloid
Represent with the help of a simple chart how matter is classified into pure or impure substances & further into elements, compounds & mixtures, with elements further segmented.
‘The modern periodic table consists of elements arranged according to their increasing atomic numbers’. With reference to elements with atomic numbers 1 to 20 only in the periodic table – differentiate them into – metallic elements, metalloids, non-metals & noble gases.
Select the correct answer from A, B, C, D & E for the statement given below :
A non-metal that is lustrous.
Select the correct answer from A, B, C, D & E for the statement given below :
A mixture consisting of elements & a compound.
Higher Order Thinking Skills.
List out the metals, non-metals and metalloids which you use in your house, schools. Compare their properties.
