New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here

CHEM Week 2 Notes

by: Kyla Tovar

CHEM Week 2 Notes CHEM 111-003

Kyla Tovar
GPA 3.6

Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

The pretty typed of notes are the notes I took from the reading, while the images are notes I took during McFarland's lecture.
General Chemistry I
MacFarland, Kerry Jane
Class Notes
Energy, Molar, mass, Molecules, avogrados, atomic, periodic
25 ?




Popular in General Chemistry I

Popular in Chemistry

This 14 page Class Notes was uploaded by Kyla Tovar on Saturday September 3, 2016. The Class Notes belongs to CHEM 111-003 at Colorado State University taught by MacFarland, Kerry Jane in Fall 2016. Since its upload, it has received 11 views. For similar materials see General Chemistry I in Chemistry at Colorado State University.


Reviews for CHEM Week 2 Notes


Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 09/03/16
Chapter 2.1 The Rutherford Model of Atomic Structures th  The end of the 19 century, realized atoms were not the smallest particles of matter  Made up of smaller subatomic particles o The neutrons, protons, and electrons in an atom  Electron o J.J Thomson set out to better understand how gases conduct electricity o Cathode rays: streams of electrons emitted by the cathode in a partially evacuated tube o Discovered cathode- ray becomes can be deflected by magnetic and electric fields o Discovered electrons are fundamental particles that occur in all forms of matter o Robert Millikan discovered the charge and mass o Ion: an atom or molecule that has a positive or negative charge o Cation: a positive charged ion o Anion: a negatively charged ion o Millikan discovered that the charge on each drop was always a whole number of a minimum charge o Conducted electron charge was within 1% of -1.602x10^-19 o Radioactivity: The spontaneous emission of high-energy radiation and particles by material o Beta (B) particles: a radioactive3 emission that is a high-energy electron o Aplha (a): particle: a radioactive emission with a charge of 2+ and a mass equivalent to that of a helium nucleus o A particles are about 10,000 times more massive than b particles o Nucleus: the positively charged center of an atom that contains nearly all the atom’s mass  The Nuclear Atom o Protons: a subatomic particle, present in the nucleus of an atom, that has a relative charge of 1+ and a mass number of 1 o Neutrons: an electrically neutral (uncharged) subatomic particle with a mass number of 1 o Atomic mass unit (amu): unit used to express the relative masses of atoms and subatomic particles that is exactly 1/12 the mass of 1 atom of carbon with 6 protons and 6 neutrons in its nucleus o Dalton (Da): a unit of mass equal to 1 atomic mass unit Chapter 2.2 Nuclides and Their Symbols  Isotopes: atoms of an element containing the same number of protons but different number of neutrons  Nuclide: a specific isotope of an element  Atomic Number (Z): the number of proteins in the nucleus of an atom  Nucleon: a proton or neutron in a nucleus  Mass number (A); the number of neutrons in an atom  The name of a nuclide may be spelled out as the name of the element followed by the mass number of the nuclide 2.3 Navigating the Periodic Table  Dmitri Mendeleev published the Modern Periodic Table  Periodic Table of Elements: a chart of the elements in order of their atomic numbers and in a pattern based on their physical and chemical properties  Left empty shells for unknown elements  Period (of elements): all the elements in a row of the periodic table  Group or family (of elements): all the elements in a column of the periodic table  Radionuclide: a radioactive (unstable) nuclide  Some groups have names as well as numbers  Halogens: an element in group 17 of the periodic table  Alkali metals; an element in group 1 of the periodic table  Alkaline earth metals: an element in group 2 of the periodic table  Metals: elements that are typically shiny, malleable, ductile solids that conduct hear and electricity well and tend to form positive ions  Nonmetal elements: elements with properties opposite those of metals, including poor conductivity of heat and electricity  Metalloids or semimetals: elements that tend to have the physical properties of metals and the chemical properties of nonmetals  Main group elements or representative elements: the elements in groups 1,2, and 13 through 18 of the periodic table  Transition metals: the elements in groups 3 through 12 of the periodic table  Noble gases: the elements in group 18 of the periodic table, Chapter 2.4 The Masses of Atoms, Ions, and Molecules  Average atomic mass: the weighted average of masses of all isotopes of an elements, calculated by multiplying the natural abundance by multiplying the natural abundance of each isotope by its mass in atomic mass units and then summing the products o The number below the symbol is the weighted average of the masses of all isotopes of the element  Natural abundance: the proportion of a particular isotope, expressed as a percentage, relative to all the isotopes of that element in a natural sample  We can calculate the average atomic mass by multiplying the mass of each of its isotopes by its natural abundance and then summing the three weighted masses  No atom has the average atomic mass  Molecular mass: the mass in amu of one molecule of a molecular compound o Expressed in amu o To calculate, add up the average atomic masses of the atoms in each of its molecule  Formula units: the smallest electrically neutral unit of an ionic compound  Formula mass: the mass in amu of one formula unit of an ionic compound Chapter 2.5 Moles and Molar Masses  Mole (mol): an amount of a substance that contain Avogrado’s Number (Na= 6.0221x10^23) of particles (atoms, ions, molecules, or formula units)  Avogrado’s Number (Na): the number of carbon atoms in exactly 12 grams the carbon -12 isotope: Na=6.0221x10^23, H is the number of particles in one mole  Molar mass: the mass of 1 mole of a substance o Applies to compounds and elements o The mole enables us to know the number of particles in any sample of a given substance simply by knowing the mass of a sample o The mole represents a fixed number of particles and a specific mass o


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Bentley McCaw University of Florida

"I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"

Amaris Trozzo George Washington University

"I made $350 in just two days after posting my first study guide."

Bentley McCaw University of Florida

"I was shooting for a perfect 4.0 GPA this semester. Having StudySoup as a study aid was critical to helping me achieve my goal...and I nailed it!"


"Their 'Elite Notetakers' are making over $1,200/month in sales by creating high quality content that helps their classmates in a time of need."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.