Question

write the number of significant figures in each of the following measurements : (a) 1.67 x 10^-27kg (b) 0.270cm

Answer 1

i) three significant figures

ii) three significant figures

Basic Rules of significant figures

• All the non-zero digits are significant. for example, 432 has three significant figures.
• Zeros in between two non-zero digits are also significant. For example, 509 has three significant figures.
• The ending zeros are also considered as significant. For example, 800 has three significant figures.
• The zeros to the left are not significant. For example, 0.0987 has three significant figures.