Question

the measurement, 0.002006 g, has how many significant digits?
a 1
b 2
c 3
d 4
e 5

Explanation:

Step1: Recall significant digit rules

Leading zeros (zeros before the first non - zero digit) are not significant. Non - zero digits are significant. Zeros between non - zero digits are significant.

Step2: Analyze the number 0.00206

In the number 0.00206, the leading zeros (the three zeros before 2) are not significant. The non - zero digits are 2, and 6. The zero between 2 and 6 is also significant. So the significant digits are 2, 0, 6. Counting these, we get 3 significant digits.

Answer:

C. 3