Homework due on 9/30

Finish the work started in class and turn in on Tuesday 9/30

Periodic Table Activity

1. Explain why light is said to have a dual nature.

2. Draw a wave and label the crest, trough, and wavelength.

3. Draw a picture of the different types of electromagnetic radiation and show the high energy             low energy and long wavelength            short wavelength. Make sure to label all the different types of energy.

4. Explain what happens when an electron in an atom becomes excited.

5. When an electron is excited a photon is ____________. When an electron returns to ground state a photon is _____________.

6. Draw the shape of a “s” orbital.

7. Draw the shape of a “p” orbital.

8. Draw the shape of a “d” orbital.

9. Draw and label a periodic table with the atomic charges

for the groups shown.

10. Show how atomic size changes across and down the atomic period. Draw in how the size of the atom changes and draw arrows showing how it changes.

11. Metals tend __________ electrons. Nonmetals tend to __________ electrons.

12. Show how the ionization energy changes as you move across the period and down the groups of the periodic table.  Draw the table and label with arrows and words to show the changes of ionization energy of the periodic table.

Homework due 9/29

Homework due on 9/29

pg. 392 #3-12, 16-17, 22

Tutoring Schedule

Tutoring will take place on Friday 9/26, Monday 9/29 & Wednesday 10/1 after school.  We will start at 3:30 (don't be late!) and it will take from 45 minutes to an hour. 

You will receive extra credit toward your test scores for attending.

Electric Solution Lab

Finish any Electric Solution Lab questions not finished

Pre-Lab Questions:

1. Why does the light bulb light up? What does it mean if the light bulb doesn’t light?

2. Why did we add nothing to a beaker of water and test it?

Questions:

4. How are the compounds similar that caused the bulb to light?

5. True or false: The reason a compound did not cause the bulb to light is because the substance did not dissolve in water. Explain your answer.

6. What could cause a false reading or incorrect reading (light bulb lights up when it shouldn’t) in the laboratory?

 

Homework due 9/23

1) pg. 376 #1, 3-5, pg. 390 # 3, 5, 7

Homework due for 9/22

1) pg. 365 #1-6, pg. 370 #3-6

plus you have an extra credit sheet that is due on Monday!

Homework due 9/15

Somehow I posted the study guide but not the homework that was due today, so if anyone missed it here it is...

pg. 87 #19-24, 26-30, 32-43

Homework due 9/16

1) pg. 88 #45-48, 50-54, 57-58
2) Chapter 2 & 3 Test Wednesday-study guide posted online
3) Any late homework from Chapter 2 or 3—last chance Wednesday (pg. 30 and on!)
4) Bring lab safety contract if you have not already or you will NOT participate in Tuesday's lab

Chapter 2 & 3 Test Study Guide

Here are the answers for the practice test for Chapter 2 & 3:

Chapter 2-pg. 47
1. D 2. C 3. B 4. A 5. D 6. B 7. B 8. E 9. C 10. D


Chapter 3-pg. 91
1. C 2. B 3. D 4. C 5. B 6. C 7. B 8. A 9. noble gases d, alkaline earth metals a, halogens b, alkali metals c

Chapter 2 Things to know:
--Difference between an element and a compound
--Know that a molecule simply means more than one atom
--Know the three states of matter their properties and how they move
--Know difference between a physical change and a chemical change
--Understand what a mixture is and how it is different from a compound
--Be able to explain what a pure substance is
--Know the difference between a heterogeneous and a homogeneous mixture
--Know why a homogeneous mixture is a solution
--Be able to explain how to separate a mixture using filtration and distillation

Chapter 3:
--How to write a formula for a compound
--Know the structure of the atom is protons, electrons and neutrons and know their properties
--Know how to find the mass number and atomic number of an atom and what they represent
--Understand what an isotope is
--Know where groups and periods are on a periodic table
--Know what groups have in common
--Know the names of the common groups of the periodic table such as alkali metals, noble gases and so on
--Know where to find metals, metalloids and nonmetals on periodic table
--Know how to find the charge of ions on the periodic table and how it relates to chemical formulas
--Know what a cation and an anion is

Homework due 9/11

Homework due for 9/11

1) pg. 86 #4-11, 14, 16

Mixture Separation Challenge Lab

Problem: There is a mixture of sulfur, iron pieces, sugar, and wood shavings mixed together in a container. You need to devise a way to separate all four items so that you can put each item in a separate container with no other substances mixed with it. 

Devise an experiment: You and your table group are to brainstorm and devise a step by step process to separate each mixture from each other. Remember that each substance must be COMPLETELY separated from each other.  You can use anything in the room to devise your plan (but of course you need to ask Ms. Cotta first!). If you have any questions on how something works or if we have a certain tool, just ask.

Procedure: Write down your step by step procedure of how your team will separate the mixture. Make sure that Ms. Cotta has all the supplies you need to carry out your experiment.

1. Steps (each step precisely laid out and what is the purpose):

1.

2.

And keep going to until you mixture is separated into sugar, iron, wood & sulfur!

2. Now that you have attempted to separate the mixture, would you change any of the steps or how could you alter the method to improve your collection of the different substances?

3. What is the name for this kind of mixture? What makes it this kind of mixture?

4. What would happen in this activity if we used chemical changes instead of physical changes?