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प्रश्न
Draw a labelled diagram of an atom including its nucleus, orbits & their contents.
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उत्तर
संबंधित प्रश्न
Fill in the blank
A pure substance has definite.................. and constant ..............
What is the difference between a pure substance and a mixture ?
State four differences between compounds and mixtures.
Name: a Non-metal Which is a Good Conductor of Electricity.
Answer the following question:
What do you understand by the statement: ‘metals are ductile and malleable’?
Indicate whether the following statement is true or false:
All elements are artificially prepared
Indicate whether the following statement is true or false:
Ozone is a triatomic molecule
Complete the statement – an element is a pure substance made up of ____________ atoms.
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal which is required for combustion.
Reason out
Elements are called semimetals.
