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प्रश्न
Give a reason why elements are tabulated in a table called the ‘Periodic table’.
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उत्तर
For arranging all the elements in a systematic and simple manner. The arrangement of elements was done in the form of a table called Periodic Table in which elements are arranged in increasing order of their atomic numbers. Elements in the Periodic Table are arranged in Horizontal rows called Periods and vertical columns called groups. Metallic elements are placed on the left non-metallic on the right and noble gases on the extreme right of the Periodic table.
संबंधित प्रश्न
What is meant by atomicity? Name the diatomic element.
The formula of the sulphate of an element M is M2(SO4)3
Write the formula of it
Oxide
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.
Copper by ‘Cu’
Explain the terms ‘chemical formula’.
Give the symbol of the following element:
Mercury
Give the symbol of the following element:
Lead
State the type of element for the following:
Sodium
Give the symbol of the following element:
Sulphate
Write the radical of the following valency:
Sulphate
Give the formula of the following gas:
Ammonia
