What does it mean for a substance to be oxidized? The term oxidation originally came from substances reacting with oxygen gas. Explain why a substance that reacts with oxygen gas will always be oxidized.
Chapter 2: Measurement 2.1 Significant Figures A. Accuracy and Precision 1) Accuracy: how close a measured value is to _____ the actual value__. 2) Precision: how close measured values are to _each other (average)_ B. Measured numbers • There will be some _uncertainty_ in where to round off a measured quantity based upon the precision of the measuring instrument. • The level of uncertainty is reported by using Significant Figures_ • The _more_ Significant Figures reported, the _more certain_ the measurement. C. Significant Figures (SF) 1 1) A number is Significant if it is: a) Not zero