Covalent Bonding Resources/Practice

https://www.sophia.org/tutorials/multiple-covalent-bonds--2

https://www.sophia.org/tutorials/lewis-dot-diagrams-of-molecules-single-bonds

https://www.sophia.org/tutorials/lewis-dot-diagrams-of-molecules-double-bonds

https://www.sophia.org/tutorials/lewis-dot-diagrams-of-molecules-double-bonds


http://teacherweb.com/WA/CloverParkHighSchool/Meldrum/Electron-Lewis-Dot-IampII-and-answers.pdf

Project 1 EXAM - Wednesday October 21st

Here is some extra practice

Atomic Structure 


Unit Conversion


SigFigs Practice Problems


Ionic and Covalent Naming - Use your Polyatomic Ion Sheet


EM Radiation Practice

Biochemistry Exam - Material to be Assessed

Here is the content that will be covered on this exam:

• Atomic Structure
• Protons, Neutrons and Electrons (symbols, location, charge)
• Isotopes
• Periodic Table (avg atomic mass, atomic number)
• Ions
• Cations and their charges (groups 1, 2 and 3 only)
• Anions and their charges (groups 15, 16 and 17)
• Naming Ionic Compounds
• Monatomic Ions (i.e, NaCl)
• Polyatomic Ions (i.e. NaNO3) **can't subscript on blogspot, my apologies)
• Naming Covalent Molecules
• Binary molecules use prefixes (CO vs CO2) ** 
• EM Radiation
• EM Spectrum
• Higher vs Lower Energy
• speed of light  = wavelength x frequency
• Relationship between wavelength, frequency and energy
• Energy of Photons
• E = h x V
• Calculating Energy to compare to EM Spectrum
• Experimental Design
• Hypothesis 
• Representing Data
• Using Data to Draw Conclusions
• Constants vs. Variables vs. Controls
• Precision vs. Accuracy
• Precision in the equipment
• Precision in the form of repeatable data/results
• Accuracy comparing you results to known, accepted values
• Significant figures
• Number of Sigfigs in a given measurement
• Sigfig rules for zeroes
• Rounding to correct sigfigs during calculations

Significant Figures and Rounding Resources

Here are a few websites that reiterate the work done last class and what we will continue to do in the next day or two

http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch1/sigfigs.html

http://www.purplemath.com/modules/rounding2.htm

http://chemcollective.org/activities/tutorials/stoich/significant_figures


For practice problems go here

http://www.saddleback.edu/faculty/jzoval/worksheets_tutorials/ch1worksheets/worksheet_Sig_Fig_9_11_08.pdf

Lab Write-Up: DIY vs. Store Bought Sunscreen

This lab is due at the end of the day on FRIDAY OCTOBER 9th.  If you get me a copy of your lab by TUESDAY OCTOBER 6th, I will give you feedback.  See the description of the write-up below.

Lab Write-Up

For your FORMAL Lab Write-Up you need the following sections.  Next to the section is a description of the information that goes in it and relative length of each section.

Title: - Should be scientific and not "catchy."  (i.e "Investigating the Effects of Caffeine on Blood Pressure" - - - Not "Does Java Give You the Jitters?")

Introduction:  Usually about 1 page.  It should highlight the scientific concepts needed to understand the lab.  For this lab I would focus on the relationship between energy and EM radiation type, explanation of SPF, and the difference between the active ingredients.  This info should come from your research and needs to be cited.

Materials List:  A list of the materials, chemicals, equipment, etc. you used.

Procedure:  A step-by-step, specific list of the steps you took to collect the data.

Data:  Tables that organize your data.  Highlight UNITS.  Tables should have descriptive titles, especially when more than one is used.  Example:  Blood pressure readings for individuals who consumed varying amounts of caffeine.

Calculations:  Examples of any calculation you used (i.e. averages, percentages, differences, etc.)  As we do more complex labs with different calculation specific to chemistry, this section will change.

Results:  Tables that organize the answers to your calculations.  This section should highlight comparisons to your variables, but focus on the averages and not the individual trial data.

Discussion:  THIS IS NEW.  This section explains to the reader what your results mean.  Which sunscreen was better?  How do you know?  Point out specific results and explain how they lead you to make these decisions.  Is the difference a lot or a little.  This usually takes about 1 or 2 paragraphs.  The next part of the discussion educates the reader on what might have gone wrong during your lab.  This is called sources of error.   Again about a paragraph.  Lastly, the discussion ends with a suggestion to fix the sources of error and/or improve the lab if it was repeated.