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प्रश्न
Write the radical of the following valency:
Sulphate
पर्याय
1+
2+
3+
1−
2−
3−
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उत्तर
2−
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संबंधित प्रश्न
Define: Elements-
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 and the number of atoms of the following elements present in carbon dioxide.
Write the radical of the following valency:
Sodium
Write the radical of the following valency:
Zinc
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Lead
write symbol with the variable valency
Give the qualitative and quantitative meaning of the term ‘symbol’.
______ of some elements are derived from Latin or Greek names of the elements.
Write the constituent elements and their symbols for the following compounds.
- Carbon monoxide
- Washing soda
In the same way in chemistry, each element is denoted by a ______.
