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प्रश्न
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
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उत्तर
| Name | Symbol | Ion | Valency |
| Sulphide | \[\ce{S}\] | \[\ce{S^{2-}}\] | −2 |
APPEARS IN
संबंधित प्रश्न
Write the names and symbols of the first twenty elements that you have studied in class VI & VII.
Define: Elements-
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.
What do the following symbol stand for?
H2
Give two examples of the following:
Solid + Liquid mixture
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)
Give the formula of the following gas:
Nitrogen dioxide
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Iron
write symbol with the variable valency
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).
Dichromate
Name three metals whose symbols are derived from the first letter of the name of the element.
