1. Review Pre AP CH 1 , 2 Study the notes for getting good grades.
Practice problems.

4. Which is the sum of these values, to the appropriate number of significant digits? =

7. The diameter of a carbon atom is 0. 000000000231 m
The diameter of a carbon atom is m. What is this number expressed in scientific notation?

8. In the measurement 0.632 L, which digit is the estimated digit
ANSWER 2

10. Which is the product of these numbers, to the appropriate number of significant digits? × =

11. Safety Symbols
Branches of Chemistry

12. PRECISION –look for close values

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