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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’
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
Name the element used as a standard for atomic mass scale.
Give two examples of the following:
Solid + Liquid mixture
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’
Write the formula of the compound formed – given symbols and combining power or capacity (valency) of the following element in the compound.
Na1+ Cl1-
Give the symbol of the following element:
Antimony
Give the symbol of the following element:
Iodine
State the type of element for the following:
Carbon
Select the correct answer to the statement given below:
An element present in the earth’s crust, atmosphere and the human body.
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).
Zincate
Write the symbols for the following elements and classify them as solid, liquid and gas. Aluminum, Carbon, Chlorine, Mercury, Hydrogen and Helium
