Q56 of 203 Page 130

What is meant by saying that ‘the atomic mass of oxygen is 16’?

The atomic mass of oxygen is 16u, this means one atom of oxygen is 16 times heavier than 1/12th of carbon atom.


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56

Define atomic mass unit. What is its symbol?

 56

Define atomic mass of an element.

 57

The atomicities of ozone, sulphur, phosphorus and argon are respectively:

 58

The symbol of a metal element which is used in making thermometers is: