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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
The most abundant elements in the universe are
पर्याय
neon and argon
hydrogen and helium
aluminium and copper
oxygen and nitrogen
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उत्तर
hydrogen and helium
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संबंधित प्रश्न
Write true or false
A heterogeneous mixture has a uniform composition throughout the mixture
Name: Three different forms of carbon
Give one use of the following substance:
Coal
Give reason: Graphite is used to make a lead of the pencils.
Write the names of elements from the following symbol:
Pt
‘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.
Give three differences between elements & compounds with relevant examples.
State why brass is considered as a homogenous mixture while a mixture of iron & sulphur – heterogenous.
Select the correct answer from the choice given below to complete the sentence :
An example of a monoatomic molecule is ___________.
Water contains _____ and _____ element.
