Significant Figures - Rules For Significant Figures Counting

"Significant Figures - tells about the accuracy of measurement by counting the reliable uncertain digits in the given measurement quantity."

 Rules:

* All  non zero digits are counted as significant.

ex- 12134 - Number of significant figures = 5

* All the zero's on the right side of the non zero digits are not counted as significant.

ex- 854300 - Number of significant figures = 4

* All the zero's on the right side of non zero digits with a decimal in it are counted as significant.

ex- 4.56800 - Number of significant figures =  6

* All the zero's before the non digits with a decimal in it are not counted as significant.

ex- 0.007340 - Number of significant figures = 4 

* All the zero's between the non zero digits are counted as significant irrespective of where the decimal point is placed in it. 

ex- 19.00067 - Number of significant figures = 7

** If the significant figure is in the order of  a x 10 ^b    

^{Here 10 to the power's are ignored ( not taken into account), only number of significant figures in a are counted.}

ex - 3.8 x 10²¹  

Number of significant figures = 2