[CHEM 121A] - Final Exam Guide - Everything you need to know! (53 pages long)

94 views53 pages
29 Mar 2017
School
Department
Course
University of Nevada - Reno
CHEM 121A
FINAL EXAM
STUDY GUIDE
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 53 pages and 3 million more documents.

Already have an account? Log in
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 53 pages and 3 million more documents.

Already have an account? Log in
University of Nevada Reno
Fall Semester 20XX
Teacher: Ms. Wendy Writer
Email: no_reply@example.com
Chem 121A
Notes
Chapter 1 - Matter and Measurements
Key points
Elements, compounds, and mixtures
Properties of matter
Metric system
Significant figures
Dimensional analysis
What is chemistry and why do we study it?
- Chemistry is the study of matter and the changes that matter undergoes
Vocabulary
- Matter: anything having mass and taking up space
- Atoms: building blocks of matter
- Elements: matter made up of the same atoms
- Molecule: made of two or more atoms of the same specific shape
- Compound: made of two or more different elements
*compounds must have at least two kinds of atoms
States of Matter
- Gas: not distinct volume or shape, can compress or expand
- Liquid: distinct volume, no distinct shape
- Solid: distinct shape and volume
find more resources at oneclass.com
find more resources at oneclass.com
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 53 pages and 3 million more documents.

Already have an account? Log in
*at the molecular level spacing and interactions between molecules can dictate their molecules
and behavior
The Elements
- Pure substance: has distinct properties and composition
- Doesn’t vary sample to sample
- Example: salt, sugar, water, elements
- 100% chemically pure substances are rare
- Elements:
- Can’t be decomposed to a simpler substance
- 118 known elements with varied abundances
Periodic Table
- Periods: horizontal rows
- Elements arranged in order of increasing atomic numbers
- Step-like line divides metals and nonmetals
- Groups: vertical columns with like elements with similar properties
Law of constant composition
- Elemental composition of a compound is always the same
- Percent of Mass = Mass of part divided by Mass of the whole X 100
Mixtures
- Contains substances that retain their chemical identities and properties
- Variable composition (states of matter)
- Heterogeneous mixtures: not uniform throughout
- Ie. wood, oatmeal, sand
- Homogeneous mixtures: uniform throughout
- Ie. air, alloy, salt, water
find more resources at oneclass.com
find more resources at oneclass.com
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 53 pages and 3 million more documents.

Already have an account? Log in

Document Summary

Chemistry is the study of matter and the changes that matter undergoes. Matter: anything having mass and taking up space. Elements: matter made up of the same atoms. Molecule: made of two or more atoms of the same specific shape. Compound: made of two or more different elements. *compounds must have at least two kinds of atoms. Gas: not distinct volume or shape, can compress or expand. *at the molecular level spacing and interactions between molecules can dictate their molecules and behavior. Pure substance: has distinct properties and composition. Can"t be decomposed to a simpler substance. Elements arranged in order of increasing atomic numbers. Groups: vertical columns with like elements with similar properties. Elemental composition of a compound is always the same. Percent of mass = mass of part divided by mass of the whole x 100. Contains substances that retain their chemical identities and properties. Observed without change to identify and composition.

Get access

Grade+20% OFF
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers