October 14th, 2016
CH 221 Exam #1: Study Guide
Vocabulary in Chapter 1
Very important terms are in bold
Defining features of the states of matter
Solid (fixed, rigid shape, does not conform)
Liquid (varying shape, conforms to container, has upper surface)
Gas (varying shape, fills entire container, no surface) 1
Distinction between physical and chemical changes/properties
Physical properties characteristics a substance shows by itself without changing into or interacting with another substance Ex. Ice (solid)-------Water (liquid)
Chemical properties characteristics a substance shows as it changes into or interacts with another substance(s) Ex. Water + electric current = hydrogen + oxygen
Physical changes: No change in composition
Chemical changes: Change in composition (substance becomes a different substance)
We also discuss several other topics like Do the planets enact gravitational force on the sun?
Nature of potential and kinetic energy
Potential energy- The energy due to the position of the object relative to other objects
Kinetic energy- The energy due to the motion of an object
1. When energy is converted from one form to the other, it is consumed not destroyed
2. Situations of lower energy are favored over situations of high energy
Process of the scientific method
Memorize SI Units and prefixes
Distinguish between intensive and extensive properties
Rules for significant figures and rounding
Accuracy vs. Precision
Define characteristics of elements,
compounds and mixtures
Understanding the three mass laws
Postulates of Dalton’s atomic theory
Discovery of atomic structure
Parts of an atom
Format of the periodic table and location of major groups
Determining ionic vs covalent compounds
Difference between empirical and molecular formulas
Don't forget about the age old question of What hormone increases calcium levels in blood and tissue fluid by releasing calcium from bones and enhancing calcium absorption in the digestive tract and kidneys?
Don't forget about the age old question of What is india?
Don't forget about the age old question of What is megasporogenesis?
We also discuss several other topics like How do we persuade?
We also discuss several other topics like Quien means?