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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).
Iodide
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उत्तर
| Name | Symbol | Ion | Valency |
| Iodide | \[\ce{I}\] | \[\ce{I^{1-}}\] | −1 |
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संबंधित प्रश्न
State whether the following statement is true or false:
The symbol of element cobalt is CO.
Explain the terms 'valency' and 'variable valency'.
Match the metallic elements – with their correct symbols Metallic elements
| Metallic elements | Symbol |
| (a) Potassium | (1) Ca |
| (b) Sodium | (2) Zn |
| (c) Calcium | (3) Pb |
| (d) Magnesium | (4) Hg |
| (e) Zinc | (5) Cu |
| (f) Aluminum | (6) Au |
| (g) Iron | (7) K |
| (h) Lead | (8) Fe |
| (i) Copper | (9) Al |
| (j) Mercury | (10) Na |
| (k) Silver | (11) Mg |
| (l) Platinum | (12) Pt |
| (m) Gold | (13) Ag |
Explain the terms ‘chemical formula’.
Give the symbol and the number of atoms of the following elements present in water.
Match the formulas of the following of bases with their correct names.
Bases – (a) NaOH (b) KOH (c) Ca(OH)2 (d) Zn(OH)2
Names – (1) Potassium hydroxide (2) Zinc hydroxide (3) Aluminium hydroxide (4) Calcium hydroxide (5) Sodium hydroxide
Give the symbol of the following element:
Magnesium
State the valency of the following metallic element and write symbol with the valency
Potassium
Define Alchemy.
Name the elements with the following symbols.
- Na
- W
- Ba
- Al
- U
