1.

Assertion (A) : Mass number of a carbon is 12.Reason ( R): Carbon possesses equal number of all three fundamental particles.

Answer»

Both A and R are true and R is the correct explanation For A.
Both A and R are true but R is not the correct EXPLANATIONFOR A.
A is true and R is FALSE.
A is false and R is true.

Solution :NUMBEROF electronic , protons and neutrons in carbon are equal , that is 6.the mass number of carbon is 12.


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