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प्रश्न
Name: Three different forms of carbon
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उत्तर
Three different forms of carbon are:
1. Diamond
2. Graphite
3. Coal
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संबंधित प्रश्न
Define Elements.
Give two examples of the following.
Non-metals which are lustrous
Give reason: Graphite is used to make a lead of the pencils.
Indicate whether the following statement is true or false:
Molecules combine to form atoms
Tick (√) the correct alternative from the choice given for the following statement
The most ductile metal.
Give the name of the radical - CO3
Complete the statement given below by filling in the blanks with the correct words.
Atom contains ________ , with positively charged _____.
‘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.
Classify the following as elements and compounds.
Water, Common salt, Sugar, Carbon dioxide, Iodine and Lithium
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 other than carbon that shows allotropy.
