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प्रश्न
Write the chemical formula of the following:
magnesium sulphate
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उत्तर
MgSO4
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संबंधित प्रश्न
Name the element used as a standard for atomic mass scale.
Define atomic mass unit. What is its symbol ?
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’
Match the symbols of non-metallic elements with their correct combining power or capacity.
(a) O
(b) S
(c) Cl
Combining power or capacity A : 3; B : 2; C : 1. (negative valencies)
State the type of element for the following:
Arsenic
Give the symbol of the following element:
Sulphate
Select the correct answer from the choice in the bracket.
The formula of caustic soda.
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).
Plumbite
Symbol of mercury is
How many elements are known at present?
