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प्रश्न
‘An atom is the basic unit of an element’. Draw a diagram of an atom – divisible as seen today.
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उत्तर
‘An atom is the basic unit of an element’.
An atom of fluorine [At. No. 9]
\[\ce{\underset{\text{[atomic no.]}}{Z} = \underset{\text{[no. of protons]}}{P} = \underset{\text{[no. of electrons]}}{e}}\]
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संबंधित प्रश्न
Differentiate between the following.
Filter Paper and Alum
Give Two Examples for Each of the Following: Non-metals
Write the Chemical Name of the Following and Also Give Their Molecular Formulae:
Vinegar
Name: a Metal Which is a Poor Conductor of Electricity.
Give one use of the following substance:
Coal
Find the atomicity of the Following molecule:
Calcium Chloride
Tick (√) the correct alternative from the choice given for the following statement.
The compound used as common salt is
Elements are broadly classified into metals and non-metals. State six general differences in the physical properties of metals and non-metals. State two metals and two non-metals which contradict with the general physical properties – giving reasons. State one difference in property between metalloids and noble gases.
Explain the term ‘mixture’.
Assertion: Air is a mixture of elements only.
Reason: Only nitrogen, oxygen and neon gases exist in air.
