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प्रश्न
Indicate whether the following statement is true or false:
All elements are artificially prepared
पर्याय
True
False
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उत्तर
False
Correct Statement: All elements are made up of a limited number of basic substances
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संबंधित प्रश्न
Correct the following statement:
CO and Co both represents cobalt.
Give Two Examples for Each of the Following: Metalloids
Classify the following substances into elements and compounds
Mercury, sulphur, sugar, water, sand, gold, carbon, oxygen, alcohol, iron, marble, baking soda.
Define a pure substance. How many types of pure substances do you know?
Give two examples of the following.
Metals which are soft
Give one use of the following substance:
Iron
Answer the following question:
Give the advantages of using symbols instead of names of elements or compounds.
Find the atomicity of the Following molecule:
Aluminium Suiphide
Draw a labelled diagram of an atom including its nucleus, orbits & their contents.
Differentiate between homogenous & heterogeneous mixtures.
