# How many significant figures are in the measurement 0.0034 kg?

##### 1 Answer

Two significant figures.

#### Explanation:

For starters, you should know that **non-zero digits** are **always significant**.

So right from the start, you know that this measurement has *at least* two significant figures,

#0.0034 -># twonon-zero digits#=# twosig figs

Now, are the zeroes significant as well?

The answer is no. The reason is that zeroes that come **after** the decimal point are only significant if the number is **greater than** **two non-zero digits** for numbers that are **smaller than**

#color(red)(color(black)(1.)00color(black)(34)# #-># the zeroes are significant because they follow the decimal point for a number that is#>1#

#0.1color(red)(00)34 -># the zeroes are significant because they are sandwiched between two non-zero digits for a number that is#<1#

In your case, you have a number that is smaller than **not** sandwiched between two non-zero digits, hence they are **not** significant.

Therefore, your measurement will have **significant figures**, the two non-zero digits.