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प्रश्न
If the symbol for Cobalt, Co, were written as CO, what would be wrong with it?
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उत्तर
Co stands for Cobalt. If we write CO, then it would mean that it is a compound containing two non-metal ions, i.e. carbon and oxygen, which forms carbon monoxide gas.
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संबंधित प्रश्न
Define: Elements-
What is the significance of the symbol of an element ? Explain with the help of an example.
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.
Hydrogen by ‘H’
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 |
Match the formulas of the following of acids with their correct names:
Acids – (a) HCI (b) HNO3 (c) H2SO4 (d) H2CO3
Names – (1) Carbonic acid (2) Sulphuric acid (3) Hydrochloric acid (4) Nitric acid
State the type of element for the following:
Sulphur
State the type of element for the following:
Calcium
Write the radical of the following valency:
Chlorine [Chloride]
Write the symbols for the following elements.
- Oxygen
- Gold
- Calcium
- Cadmium
- Iron
The first letter of a symbol is always written as a ______ letter and the second letter as a ______ letter.
