Question

The number of significant figures in $N_0=6.022\times {10}^{23}$ i.e., Avogadro's number, is :

• A. three
• B. four
• C. twenty six
• D. twenty seven

Answer 1

The correct option is B four

When numbers are written in scientific notation, then the number of digits between 1 and 10 gives the number of significant figures. Thus, the number of significant figures in $6.022\times {10}^{23}$ is $4$.