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प्रश्न
Describe the different ways in which we can write the symbols of elements. Give appropriate examples.
उत्तर
The following rules are followed while assigning symbol to an elements:
- Chemical symbols usually consist of one or two letters.
- The symbols of most elements correspond to the first letter (which is capitalized) of their English name. For example, the symbol for oxygen is “O” and that for hydrogen is “H”.
- When there is more than one element that begins with the same letter, their symbols take two letters.
- The first letter is capitalised while the second letter has a lower case.
- For example, the names of both hydrogen and helium begin with H. So, hydrogen is represented by the symbol H and Helium by He.
| Element | Symbol |
| Hydrogen | H |
| Fluorine | F |
| Aluminimum | Al |
| Argon | Ar |
| Phosphorus | P |
| Sulphur | S |
| Chromium | CrCo |
| Cobalt |
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संबंधित प्रश्न
On what principle are the following methods of separation based? Give one example of a mixture for each of the methods mentioned in which they are used
Magnetic separation
Write the formula of the compound formed – given symbols and combining power or capacity (valency) of the following element in the compound.
Ca2+ NO31-
Give the symbol of the following element:
Arsenic
State the type of element for the following:
Radon
Write the radical of the following valency:
Nitrate
Write the radical of the following valency:
Aluminium
Give the formula of the following acid:
Hydrochloric
Give the formula of the following gas:
Nitrogen
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Silver
write symbol with the variable valency
The chemical symbol for sodium is
