2. Significant Figures

• All NON-ZERO digits are significant


  1.3789 -> 5 SF
• LEADING zeros are not significant


  0.0085 -> 2 SF
• CAPTIVE zeroes are significant


  30.046 -> 5 SF
• TRAILING zeroes with decimal point are significant


  2.000 -> 4 SF
• TRAILING zeroes without decimal point are not significant


  2000 -> 1 SF
• EXACT numbers and constants are infinite in number 


  16 drops -> infinite
• 2.00 mL

  3 SF
• 0.0089 g

  2 SF
• 4.389 K

  4 SF
• 58 apples

  infinite
• 30000 KM

  1 SF
• 2.00008 s

  6 SF
• Addition and Subtraction - least number of significant figures after the decimal point

  Multiplication and Division - least number of significant figures
• 12.35 + 2.1 = ?

  14.5
• (57.12 cm x 1.2 cm) + (10.35 cm x 0.68 cm) = ?


  75.6 cm^2
• When reporting measurements, include the digit that was?

  estimated
• What is all digits that you are sure of and the one uncertain digit?

  Significant figures