Chem Unit 2 Review
o Unstable nucleus
o Usually Atomic number above 20
o Emits radiation to become more stable
o Can be both natural or man-made
o Produced when a stable nucleus is converted to a radioactive nucleus by
bombarding it wi
1. Significant figures represent the _ of a measurement.
c. both precision and accuracy
d. neither precision nor accuracy
2. When adding and subtracting the number of significant figures in the answer is determined b
Chapter 1 About Science
1.1 Science Is a Way of Understanding the Natural World
1) Which of the following is the most important to the process of scientific inquiry?
A) Proposing answers.
B) Devising tests.
C) Refuting currently-held understandings.
Chem Unit 3 Study Guide
o Move randomly with high velocities
o Have essentially no attractive forces towards each other
o Have a very small volume compared to the volume of the containers they occupy
o Are in constant motion
o Have kinetic e
Chem Unit 3 Math Formulas
o = (as long as P and n do not change)
o Keep the Ps and the Vs separate while dividing ( = x )
o Sample problem: Freon-12 gas, a fluorocarbon, CCl2F2, is used in refrigeration
systems. What is the new volume