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प्रश्न
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.
Helium by ‘He’
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उत्तर
Symbols: The short form or abbreviated name of the element (or radicals) The reason for representing the following element by their symbol is as follow:
Helium by He – First two letters of the name of Noble gases.
संबंधित प्रश्न
Match the noble gases – with their correct symbols:
| Noble gases | Symbols |
| (a) Helium | (1) Ar |
| (b) Neon | (2) Xe |
| (c) Argon | (3) Rn |
| (d) Krypton | (4) He |
| (e) Xenon | (5) Kr |
| (f) Radon | (6) Ne |
Give the symbol of the following element:
Silicon
Give the symbol of the following element:
Radon
State the type of element for the following:
Antimony
State the type of element for the following:
Phosphorus
Give the formula of the following acid:
Hydrochloric
Give the formula of the following acid:
Carbonic
Give the formula of the following gas:
Nitrogen
Give a reason – Magnesium [2, 8, 2] has valency 2+.
What is the expansion of IUPAC.
