Going from left to right within a period. Nucleus change become more positive filling
up that level with electrons. Attraction of nucleus for electrons increases. Atomic
size decreases. Going down a group valence electron are farther away from
Reactions in Aqueous
A. Exchange Reactions
Recall that exchange reactions have the following
Many ionic compounds undergo aqueous exchange
reactions in which the ionic partners are switched.
The solubility of the reactants a
C. Atomic Theory of Matter
In the beginning of the 1800s, chemistry was a
very different science than it is today. Little was
known about the nature and structure of matter.
Thanks to two brilliant early experimentalists, two
important chemical laws had
Electron Configurations & the
Part A: Electron Configurations
The arrangement of all of the electrons in an atom is
called the electron configuration
Electron configurations can be used to explain:
Reactivity & properties of th
Gases & the Atmosphere
A. Properties of Gases
The earth is
surrounded by a sea of
gases (the atmosphere).
Scientists have been
studying the properties
of gases for hundreds
A. Properties of Gases
On the macroscale, gases have a number
Thermodynamics: science of heat, work & the
transformations of one to the other
Thermochemistry: the study of energy changes that
occur during physical processes & chemical reactions
Energy: the capacity to do work
Now that we know something about
electron configurations, we can take a
closer look at the ways atoms form bonds.
There are two main types of chemical
A. Ionic Bonding
A. Introduction to Modern
Chemistry is the study of the structure, composition
& properties of matter and its transformations from
one form to another.
Matter is anything that has mass and occupies space.
Chemistry is ever
Chemistry 101 Review Questions for Exam III
_ 1. 5 moles of an ideal gas is heated at constant pressure from 200C to 400C. The volume of this gas will
(c) remain the same
(d) be cut in half (e) not enough information
_ 2. A sampl
Chemistry 101 Review Questions for Exam 2
1. What is the molar mass of Ca(NO3)2?
(a) 102 g/mol
(b) 164 g/mol
(c) 204 g/mol
2. What is the % by mass of Cl in CH2Cl2? (a) 83.5%
(d) 150 g/mol
(e) 116 g/mol
3. The average atomic
Chem 101 Exam 1 Review Questions
1. Which of the following is a homogeneous mixture?
2. Which of the following is a pure substance?
(a) ice cream
(c) carbon dioxide
(c) carbon monoxide
3. Which of the following rep
YORKCOLLEGE OF THE CITY UNIVERSITY OF NEW YORK
Chemistry 101: ALL SECTIONS
Dept of Chemistry office (rm. 3F01)
I. Course Description Chemical Principles I. 3 hrs. lecture, 1 hr problem lab, and 3 hrs lab.; 5 cr. Prerequisite: