# How many significant digits are in the value 0.0050340?

Jan 18, 2016

#### Explanation:

Hi! Here are the rules in identifying significant figures:

• all non-zero digits are significant
• all digits of a measured quantity including the uncertain one
• for figures including zero:
• zeros between non-zero digits are significant
(ex: 1005 kg $\to$ 4 significant number; 1.03 cm $\to$ 3 significant numbers)
• zeros at the beginning of a number are never significant
(ex: 0.02 g $\to$ 1 significant number; 0.0026 g $\to$ 2 significant numbers)
• zeros at the end of a number are significant if the number contains a decimal point
(ex: 0.0200 g $\to$ 3 significant figures; 3.0 cm $\to$ 2 significant numbers)