Q7 of 53 Page 71

What is the difference between sodium atom and sodium ion?

Sodium atom contains total 11 electrons whereas sodium ion is formed by the loss of one electron and hence sodium ion contain total 10 electrons which is similar to the noble gas configuration of neon.


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Answer the following:

(i) Name a metal which does not stick to glass.


(ii) What is the nature of zinc oxide?


(iii) What is deposited at the cathode, a pure or impure metal?


(iv) Will carbon monoxide (CO) change the colour of blue litmus?