Introduction to Gases
Properties of Gases
Gases may be compressed Gases expand to fill the container uniformly All gases have low density Gases may be mixed A confined gas exerts a constant pressure on all sides of the container
Chapter 13: Structures and Shape
2D vs. 3D
0 Lewis diagrams can tell us how atoms are connected in 2- dimensions.
0 But we live in a 3D world!
0 We need another model to determine the 3D shape of molecules.
Shapes of Molecules
0 Why is the water molecu
SA Encryption (Cryptosystem)
The RSA cryptosystem was first published in 1977. According to an article titled Twenty
Years of Attack, by Dan Boneh, the cryptosystem was first published publically by Ron
Rivest, Adi, Shamir, and Leonard Aldeman, which make
Matter and Energy
matter composed of one type of particle
definite compositions, each has set of properties that are unique
2 or more substances that exist together but not combined chemically
Add/Subtract sig. figs
round answers to same number of decimal places as measurement with fewest decimal
What is a solution?
solutions are homogeneous mixtures: uniform distribution of components. They can exist in any of
the three states.
Most present in the mix. (Usually water)
The lesser ingredient in the mix. (Kool Aid is
What is matter and what is NOT matter?
Matter is anything that has mass and takes up
space. Everything is matter except for energy: light, sound, electricity.
What are the two types of matter?
What is a pure substance?
metal and nonmetal
creates ionic bonds - electrons completely transferred
usually 2 or more nonmetals
covalent bonds- bond in which 2 electrons are shared by two atoms
polar covalent bond electrons spend more ti
CH 6 notes
Covalent (molecular) Compounds
Metal + Metal
Naming molecular compounds
1. first word= first element
2. second word= second element
The study of MATTER & ENERGY in physical & chemical changes
Matter: has mass and occupies space
the ability to do work
means how close to the "true" answer a measurem
the H30+ ion
Definite geometric structures- cations and ions are held together by ionic bonding.
The strong electrostatic forces that hold the ions in fixed position in the crystal
Made by i
the study of matter and energy
Weighted Average Mass
charge or matter
when energy is given off - gamma goes on right and it has no
Alpha Decay Extra heavy nuclei tend to use this - a helium is
Chapter 4- THE GAS LAWS I. Properties of Gases A. Gases are Easily Compressed. B. Gases expand to Fill Their Containers C. Gases have Low Density D. Gases may be Mixed. E. Gases Exert Pressure Equally in all Directions. II. Gas Measurements A. Volume
Chapter 12- Chemical Bonding A. Introduction 1. Review a. Energy Levels b. Valence electrons (s & p electrons) c. Octet Rule- Isoelectronic Ions 2. Periodic Table predicts the electron dot symbol. (or # of valence electrons) 3. Chemical Bonds: a. The