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प्रश्न
A student wants to have 3.011 × 1023 atoms each of magnesium and carbon elements. For this purpose, he will have to weigh :
विकल्प
24 g of magnesium and 6 g of carbon
12 g of carbon and 24 g of magnesium
20 g of magnesium and 10 g of carbon
12 g of magnesium and 6 g of carbon
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उत्तर
12g of magnesium and 6g of carbon
The student will have to weigh 12 g of Magnesium and 6 g of Carbon.
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संबंधित प्रश्न
Give the names and symbols of five familiar substances which you think are elements.
Write the full form of IUPAC. Name the elements represented by the following symbols:
Au, Pb, Sn, Hg
Give a reason why elements are tabulated in a table called the ‘Periodic table’.
Give the symbol of the following element:
Radon
State the type of element for the following:
Phosphorus
Write the chemical formula of the following:
magnesium oxide
Give the formula of the following acid:
Nitric
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Oxide
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Sulphide
Name three metals whose symbols are derived from the first letter of the name of the element.
