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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).
Sulphate
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उत्तर
| Name | Symbol | Ion | Valency |
| Sulphate | \[\ce{SO4}\] | \[\ce{[SO4]^{2-}}\] | −2 |
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संबंधित प्रश्न
Write the names and symbols of the first twenty elements that you have studied in class VI & VII.
An atom of an element is denoted by a “symbol” Explain the meaning of the term ‘symbol’. State a reason for representing the following element by its symbol.
Helium by ‘He’
Give the symbol of the following element:
Aluminium
Define the term ‘valency’.
State the valency of the following metallic element and write symbol with the valency
Zinc
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Copper
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).
Carbonate
Complete the statement given below by filling in the blanks with the correct words.
From the elements – He, Br, Pt and O; the element which forms a polyatomic molecule is ________ and which is liquid at room temperature is ________.
What does the symbol '⇌' present in a chemical equation, mean?
Write the symbols for the following elements and classify them as solid, liquid and gas. Aluminum, Carbon, Chlorine, Mercury, Hydrogen and Helium
