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प्रश्न
Write the radical of the following valency:
Hydroxide
पर्याय
1+
2+
3+
1−
2−
3−
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उत्तर
1−
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संबंधित प्रश्न
Why is the symbol S for sulphur, but Na for sodium and Si for silicon?
Match the non-metallic elements – with their correct symbols. Non-metallic elements are:
| Non-Metallic elements | Symbol |
| (a) Carbon | (1) O |
| (b) Chlorine | (2) I |
| (c) Oxygen | (3) Si |
| (d) Phosphorus | (4) C |
| (e) Hydrogen | (5) Cl |
| (f) Nitrogen | (6) P |
| (g) Iodine | (7) F |
| (h) Bromine | (8) H |
| (i) Fluorine | (9) S |
| (j) Silicon | (10) Br |
| (k) Sulphur | (11) N |
Give the symbol of the following element:
Bromine [bromide]
Give the formula of the following gas:
Carbon monoxide
State a reason why the symbol of calcium is ‘Ca’ and of copper is ‘Cu’
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
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).
Phosphate
Name three metals whose symbols are derived from the first letter of the name of the element.
Write the symbols for the following elements.
- Oxygen
- Gold
- Calcium
- Cadmium
- Iron
What does a chemical symbol represent?
