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प्रश्न
Fill in the blank:
Symbolic expression for a molecule is called _____.
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उत्तर
Symbolic expression for a molecule is called molecular formula.
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संबंधित प्रश्न
The symbols of the elements cobalt, aluminium, helium and sodium respectively written by a student are as
follows. Which symbol is the correct one ?
Fill in the blank:
Dalton used symbol _____ for oxygen and _____ for hydrogen.
Give a reason why elements are tabulated in a table called the ‘Periodic table’.
Write the radical of the following valency:
Oxygen
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).
Bicarbonate
State why the molecular formula of zinc carbonate is ZnCO3 .
______ of some elements are derived from Latin or Greek names of the elements.
How many elements are known at present?
Write a note on Greem symbols.
Which letter is never used in any element symbol?
