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प्रश्न
Select elements and compounds from the following list: Iron, plaster of paris, chalk, common salt, copper, aluminium, calcium oxide, cane sugar, carbon, silica, sodium sulphate, uranium, potassium carbonate, silver, carbon dioxide.
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उत्तर
| Elements | Compounds |
| Iron | Plaster of paris |
| Copper | Chalk |
| Aluminium | Common salt |
| Carbon | Calcium oxide |
| Uranium | Cane sugar |
| Silver | Silica |
| Sodium sulphate | |
| Potassium carbonate | |
| Carbon dioxide |
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संबंधित प्रश्न
Match the symbols of non-metallic elements with their correct combining power or capacity.
(a) O
(b) S
(c) Cl
Combining power or capacity A : 3; B : 2; C : 1. (negative valencies)
Write the formula of the compound formed – given symbols and combining power or capacity (valency) of the following element in the compound.
Ca2+ NO31-
Give the symbol of the following element:
Iodine
Write the radical of the following valency:
Aluminium
Write the radical of the following valency:
Calcium
Give the formula of the following gas:
Hydrogen chloride
State the valency of the following metallic element and write symbol with the valency
Chromium
What does the symbol '→' present in a chemical equation, mean?
What is the significance of the symbol of an element?
What is the rarest natural element on the earth?
