Gamma rays are high-energy electromagnetic radiation ONLY
There is NO CHANGE in the identity of an ELEMENT upon the release of
Relative Penetration of Radiation
Irene And Frederic Joliet-Curie
Pierre and M
The Orbit Model
Spaced dierently for each element
Imagine rungs on dierent ladders
Explains why each has its own distinct line spectrum
Bohr won Nobel Prize in Physics in 1922
Electrons in Orbitals NOT Orbits
Reported digits of a measured quantity
Exact numbers always have infinite amount of significant digits.
Nonzero digits are always significant
Captivezeros are always significant
Leadingzeros are NOT significant
Trailing zeros are
Test on Tues Sept 9.
BRING PENCIL, ISU ID, & CALCULATOR
3 X 5 in INDEX CARD(handwritten notes)
Make sure you take lecture quiz by 5:00 on Sept. 6
You can take this quiz 3 times.
I will post 2 new assignments on Friday that correspond to Tues and
Chemistry and the gym
Credit: Dynamic Graphics/Jupiter Images
Sedentary lifestyle is in direct conflict with human chemistry, physiology,
Ancient cultures had strenuous physical activity for work, religious, and
Chemistry is NOT new
Examples of early Chemistry
Cave people found stu to paint
Tested/Experimented with dierent materials to get the desired eects
Wine making is a chemical reaction to turn grapes into alcohol.
Nature of S
These are also types of exam questions!
Acetylene (C2H2) torches produce a very hot flame used in welding.
Write a balanced reaction.
How many grams of oxygen are required to react with 78 g of acetylene?
How many grams of CO2 are produced?
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tau-worm 10.0 Pblnh 0 Arm
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O '-" O noon
0 C mm
( 3 GD GD GD
gives red blood cells their color
Credit: Visuals Unlimited
vary in shape, size, and function: single-celled Amoeba proteus
Credit: Getty Images
Cells vary in shape,
size, and function: nerve cells
Credit: Visuals Unlimited
Sir Isaac Newton
White light is composed of ROY G. BIV colors
Red light longer wavelengths, lower energy
Violet light shorter wavelengths, higher energy
When white light passes through a glass prism, it separates into a
Gemstones are colored b
The two general types of energy
kinetic (energy of motion)
Can also use calories (4.184 J = 1 cal)
1 food calorie(Cal) = 1000 cal
Convert to Joules.
Skim milk (80 Cal)
Soda (120 Cal)
Which is more en
Democritus (Greek philosopher 460-370 B.C)
Coined the term "atomos"
Unifying theory 1803
Dace collected form many dierent chemists
Had no direct evidence that atoms even exist
Some aspects are not
Food Guide Pyramids
USDAs Original Pyramid
Grains form the base of the pyramid; fats, oils, and sweets form the tip;
fruit, vegetable, dairy, and protein groups are in the middle.
Importance of exercise is stressed.
Healthy Eating Pyramid
Assignment for August 21 lecture.
Overview of the Environment
The solid surface of the Earth
The gaseous layer of air surrounding the Earth
The aqueous part of the Earth
Traditional Energy Resources
Molecule is polar or nonpolar-negative side and a positive side
Polar bond- dierent atoms
Nonpolar bond - same atom
N is the row number . Orbitals (sub-levels)
Which of the the follow is an element - gold
Pure substance- carbon dioxid
Solid- liquid = melting point
Liquid -gas = boiling point
Dipole dipole- polar
London dispersion- weakest, non-polar can only have, polar, gasses
Hydrogen- strongest, polar must have a H bond , H-F,
Final Exam Chem 102
1. I. If A, then B, B therefore A
II. If A, then B, Not A therefore not B
III. If A, then B, Not B therefore not A
IV. If A, then B, A therefore B
Which of the following statements are Invalid?
I and II
2. Which argument best represent
Chem Exam 2
1. Use the Thermochemical equation reaction below to calculate the energy released
from the combustion of 245 grams of Glucose.
2. Use the above equation to calculate the energy content of glucose.
3. The heat
ARIANA BAKAS & JAWILL ALDRIDGE
OCTOBER 22, 2016
SCIENTIFIC NAME: MARCROCHELYS TEMMINCKII 
LARGEST FRESHWATER TURTLE IN NORTH AMERICA
THIS SPECIES HAS A LONG TAIL, LARGE TRIANGLE-SHAPED HEAD, CURVED
BEAK, AND ROU
John Newlands: Arranged elements in order of increasing mass & assigned each an ordinal number designating its mass rankinglaw of octaves- (7 elements)
Mendeleev: Period table of elements 1869. Focused on valence&chemical property. ordered by mass, when h
Lecture Quiz I
1. The "razor" of Franciscan friar and English philospher and logician William Ockham was conceived for what purpose?
A. shaving away unnecessary entities in the rational explanation of phenomena
B. cutting soft and reactive metals
Chapter 6: The Elements
- By 1794, Lavoisier had compiled a list of 32 elements. In the ensuing years, more elements were discovered, each with a new set of properties.
- Characteristically, scientists sought to discern an order in the propertie
CHAPTER 6: THE ELEMENTS
6.2 Early Attempts of Organize the Chemical Elements
- English chemist John Alexander Reina Newlands in 1864. Newlands, an amateur musician, assigned each element an ordinal, or integer, number ranking of the mass of
CHEM FINAL STUDY GUIDE
1.Which description best applies to the process of inductive logic?
A. Boolean Algebra
B. Making blind guesses
C. Reasoning from general principles to specific facts.
D. Reasoning from intuition
E. Reasoning from specific facts to g
CHAPTER 7: ENERGY IN CHEMICAL REACTION
- Almost all chemical reactions are accompanied by changes in energy; in some cases, re actions release energy and in others, e nergy is consumed
- Just as the mass relationships of reactants and pro
CHAPTER 6: THE ELEMENTS VOCABULARY
Acid: A molecule or other entity that can donate a proton or accept an electron pair in reactions.
Atomic Number: The number of protons in the nucleus of an atom, which determines the chemical properties of an element an