Q6 of 56 Page 84

Write true or false for the following statements:

A group of atoms carrying a charge are called bivalent ions.

False

A group of atoms carrying a charge is called polyatomic ion. These are a group of atoms carrying either a negative or positive charge. For example: SO32-, OH- etc.


Hence, the given statement is wrong.


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The formulae of cupric oxide and cuprous oxide are CuO and Cu2O respectively.

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The elements having one valency are called monovalent.

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Atomicity of phosphorus is 5 and that of sulphur is 6.

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Write true or false for the following statements:

A mole always represents 6.023 x 1022 atoms or molecules or ions of a substance.