monday october 28 th , 2013

Monday October 28th, 2013

Entry Task/Warm-Up

• Please take your notebook and your homework

Due Today:

• Word Splash and Find that Element Worksheet

Homework:

1. Bohr Structure Practice due Tuesday 10/29/2013 for 20 points

Schedule:

• Notes: How to construct a Bohr Structure

Objective: I can identify and construct Bohr and Lewis Structures

Bohr Diagrams Review1) Draw a nucleus with the

element symbol inside.

2) Carbon is in the 2nd period, so it has two energy levels, or shells.

3) Draw the shells around the nucleus.

CC

Bohr Diagrams Review

1) Add the electrons.

2) Carbon has 6 electrons.

3) The first shell can only hold 2 electrons.CC

Bohr Structure1) Since you have 2 electrons

already drawn, you need to add 4 more.

2) These go in the 2nd shell.

3) Add one at a time -starting on the right side and going counter clock-wise.

CC

Bohr Diagrams

Try the following elements on your own:

a) H

b) He

c) O - 8 electrons

d) Al

e) Ne

f) K

OO

Bohr Diagrams


a) H

b) He

c) O

d) Al - 13 electrons

e) Ne

f) K

AlAl

Bohr Diagrams


a) H

b) He

c) O - 8 electrons

d) Al

e) Ne

f) K

OO

1) Check your work.

2) You should have 6 total electrons for Carbon.

3) Only two electrons can fit in the 1st shell.

4) The 2nd shell can hold up to 8 electrons.

5) The 3rd shell can hold 18, but the elements in the first few periods only use 8 electrons.

CC

Bohr Diagrams Review

Complete Atomic Basic Worksheet

Bohr Diagrams


a) H

b) He

c) O

d) Al - 13 electrons

e) Ne

f) K

AlAl

Tuesday, October 29th, 2013

Entry Task/Warm-Up


Due Today:

• Bohr Structure Practice

Homework:

1. Lewis Structure Practice Wed/Thurs 10/30-10/31 for 27 Points

Schedule:

• Notes: Lewis Structures

Objective: I can differentiate between chemical and physical properties

Lewis Structures Review

• Find out which group (column) your element is in.

• This will tell you the number of valence electrons your element has.

• You will only draw the valence electrons.

www.chem4kids.com

http://www.chem4kids.com/

http://www.chem4kids.com/

Lewis Structures Review1) Write the element symbol.

2) Carbon is in the 4th group, so it has 4 valence electrons.

3) Starting at the right, draw 4 electrons, or dots, counter-clockwise around the element symbol.

Lewis Structures Review1) Check your work.

2) Using your periodic table, check that Carbon is in the 4th group.

3) You should have 4 total electrons, or dots, drawn in for Carbon.

Complete Lewis Structure Notes Worksheet and

Atomic Basic WorksheetSHOW FOR A STAMP WHEN DONE!

Lewis Structures Homework Assignment

On a sheet of paper draw Lewis Structures for the following elements:

Hydrogen, Barium, Silicon, Neon, Oxygen, Sulfur, Iodine, Magnesium, Aluminum, Potassium, Bromine, Arsenic, Fluorine, Sodium, Calcium, Strontium, Rubidium, Cesium, Xenon, Indium, Tin, Selenium, Tellurium.

Draw Bohr Structures for the following elements:

Boron, Sulfur, Hydrogen and Magnesium

Wed/Thurs 10/30-10/31/2013Entry Task/Warm-Up


Due Today:

• Lewis Structure Practice

Homework:

1. Physical vs. Chemical Properties Worksheet due Friday 11/1/2013 for 15 Points

Schedule:

• Notes: Physical and Chemical Changes

Objective: I can differentiate between chemical and physical properties

Atomic Basics Worksheet!! You will have 30 minutes in class to complete this assignment.

It will be TURNED IN FOR A GRADE, not on your stamp sheet.

When you are finished, bring it up to Ms. Andrews’ desk and find something quietly to do for the remainder of the time

This assignment is worth 25 points before the end of the hour, if it is not finished, TURN IT IN TORMORROW FOR LATE CREDIT!!

Physical Property

Characteristic of a pure substance that can be observed WITHOUT changing it into another substance.

Page 29

Physical Properties of Matter• It does NOT CHANGE into something

else

• Examples

color

shape

taste

state/phase

densityD = m V

Physical Change• a change in shape, size, color, or state• a change without a change in chemical

composition

• a change that is reversible• The Mixtures Lab

• Examplestearing paper

cutting your hair change in state

http://www.harcourtschool.com/activity/mixture/mixture.html

Chemical Property

A characteristic of a pure substance that describes its ability to change into a DIFFERENT substance.

Page 29

Chemical Properties of Matter• changes into a new substance

• Examples

flammability

reactivity with vinegar

reactivity with oxygen

Iron + Oxygen Iron oxide (rust)2Fe + 3O2 Fe2O3

Chemical Change

• a change in which a substance becomes another substance having different properties

• a change that is not reversible using ordinary physical means

• Changes that usually cause heat, sound, light, odor, fizzing/foaming, color changes

• Examples

combining sulfuric acid and sugar

burning a piece of wood

soured milk

Salt: http://www.schooltube.com/video/2fa9cb3e39064832b31d/Reaction-of-Sodium-and-Chlorine

http://www.youtube.com/watch?v=nqDHwd9rG0s

http://www.youtube.com/watch?v=nqDHwd9rG0s

http://www.schooltube.com/video/2fa9cb3e39064832b31d/Reaction-of-Sodium-and-Chlorine



Chemical or Physical Property?

1. Paper is white

2. Boiling point of H2O is 100oC

3. Zinc reacts with hydrochloric acid and creates hydrogen gas

4. Nitrogen does not burn

5. Sulfur smells like rotten eggs

Physical Property

Physical Property

Physical Property

Chemical Property

Chemical Property

I.S. Learning Goal:•I can describe predict properties of elements and compounds using trends of the periodic table (e.g., metals, non-metals, bonding – ionic/covalent).

Comparing Physical and Chemical Properties

Substance/Matter Physical Property Chemical Property

Helium Less dense than air Nonflammable

Wood Grainy texture Flammable

Baking soda White powder Reacts with vinegar to produce bubbles

Powdered sugar White powder Does not react with vinegar

Rubbing alcohol Clear liquid Flammable

Red food coloring Red color Reacts with bleach and loses color

Iron Malleable Reacts with oxygen

Chemical or Physical Change?

1. Bending a Paper Clip

2. Baking a cake

3. The sublimation of carbon dioxide

4. Crushing an aluminum can

5. Vinegar and baking soda combining to create salt and water

Physical Change

Chemical Change

Chemical Change

Physical Change

Physical Change

Friday 11/8/2013

Entry Task/Warm-Up


Due Today:• Physical and Chemical

Changes Worksheet

Homework:1. Review notes for Quiz on

Tuesday 11/5/2013!!!

2. Matter Crossword Puzzle due Monday 11/4/2013 20 Points

3. States of Matter Note Page for 10 Points due 11/4/2013

Schedule:• Notes: 4 States of

Matter• Grade Checks

Objective: I can differentiate between the four states of matter

4 Physical States of Matter

•Solid •Liquid•Gas

•Plasma

Solid

• Particles are tightly compact

• Particles vibrate without the ability to move freely

• Definite shape and volume

• Solid Animation

Liquid

• Particles are tightly compact, but able to move around close to each other

• No definite shape, but definite volume

• Liquid Animation

Gas

• Particles can easily spread out or move close together

• Particle move freely and with a lot of energy

• No definite shape or volume

• Gas Simulation

Plasma

• Exist at extremely high temperatures (several million degrees Celsius)

• Particles are broken apart• Particles move freely and

with extremely high energy

• This form is not too common on Earth, however it is the most common form of matter in the universe

• No definite shape or volume (?)

• Examples: Florescent and neon lights, lightning, aurora borealis

-

-

-

Why do you think this is the most common form/state of matter in the universe?

++

+

States of Matter Diagram

http://www.youtube.com/watch?v=vDZhUkp30tE

States of Matter Continuum

Taken from: http://www.chem4kids.com/files/matter_becondensate.html

What about this continuum could be considered a little misleading?

Mass vs. WeightMass

• a measure of how much matter an object is made of

• does not change, regardless of where something or someone is

Weight

• the force of gravity on an object

• equal to the mass of the body times the local acceleration of gravity

http://www.exploratorium.edu/ronh/weight/index.html

Why do you think the person ’s weight is less on the moon?Mass = 59 kg Mass = 59 kg

Weight = 579 N Weight = 96 N

Density

• a measure of the amount of matter present in a given volume of a substance

• typically expressed in the following units:– grams per cubic centimeter (g/cm3) for solids– grams per milliliter (g/ml) for liquids

• can change as temperature and pressure change

Which do you think is more dense? Why?

The Density Triangle

D V

m

.

D = m VV = m D

m = D V

.

Calculating Density

• Density can be calculated by dividing the mass of an object by its volume

D = m V

Sample ProblemTimothy found a solid metal blockthat has a mass of 100 grams and a volume of 25 cm3. What would bethe density of the block?

D = =

100 grams25 cm3

4 grams cm3

Practice Problems

1. Find the density of a substance with a mass of 27 g and a volume of 7 cm3.

2. A block of maple has a mass of 20 grams and a volume of 26.5 cm3. What is the density of the block?

D = m V

D = m V

D =

=27 g7 cm3

3.86 grams cm3

D =

20 grams26.5 cm3

= 0.75 grams cm3

Monday 11/4/2013

Entry Task/Warm-Up


Due Today:• Nothing due Today!!

Homework:1. Review notes for Quiz

TOMORROW Tuesday 11/5/2013!!!

2. Lewis Structure due Tuesday 11/5/2013 for 20 Points

3. Chemistry Web due TODAY 11/5/2013 TURNED IN FOR 35 POINTS

Schedule:• Review Day!! • Activity: Mind Map and Lewis

Structure

Objective: I can differentiate between the different states of matter

Tuesday 11/5/2013Entry Task/Warm-

Up• Please take your

notebook and your homework

Due Today:• Lewis Structure Review

• Chemistry Web turned in for a late grade of 29/35!

Homework:1. No homework today!

2.Chemistry Exam Friday 11/15/2013

Schedule:• Quiz Today!!


Wed/Thursday 11/6-11/7/2013

Entry Task/Warm-Up


Due Today:• Nothing is due

today!!

Homework:1. Finish Tasty Solutions Lab

Write Up due Today 11/7/2013!!!

Schedule:• Notes: Solutions and

Mixtures• Lab: Tasty Solutions

Objective: I can differentiate between the different mixtures and solutions

SolventPart of the solution that is present in largest amount

and dissolves a solute

What liquid is called the “universal solvent”? WATER

Solvent - Solute - Solution

Solute

Part of solution present in lesser amount and dissolved by solvent

SolutionA well mixed mixture containing a solvent and at

least one solute that has the same properties throughout.

Tasty solution activity

Mixture

Made of two or more substances- elements, compounds or both- that are together in the same place but are not chemically combined.

Page 30

Heterogeneous Mixture

You can see the different parts

Page 30

Homogeneous Mixture

So evenly mixed that you can’t see the different parts

Page 30

Heat- transfer of energy

Exothermic- heat energy EXITS the system

- ex. Combustion, burning

http://www.graspr.com/videos/potassium-permanganate-and-glycerine-2

SaltAn example of an exothermic reaction is the mixture of sodium metal and chlorine gas which yields table salt.

2Na(s) + Cl2(g) 2NaCl(s) + energy


Endothermic- heat energy ENTERS the system

- surroundings usually feel cooler

ex. Cold packs, melting ice

Page 31

Tasty Solutions LabProcedure:

Step 1: Place one piece of candy in your mouth and allow it to dissolve without using your tongue or teeth to help! Record the time

it takes for the candy to dissolve in the chart.

Step 2: Place another piece of candy in your mouth and allow it to dissolve using only your tongue to move it around. Record the time it takes for

the candy to dissolve in the chart.

Step 3: Place another piece of candy in your mouth and allow it to dissolve using your tongue and teeth. Record the time it

takes for the candy to dissolve in the chart.

Tasty Solutions LabLab Write-Up

1.You are to answer every question in complete sentences on a separate sheet of paper

2.Record time in seconds

3.When constructing your graph, be sure to include: key, color, labels, x and y axis and titles

4.Question #2: Explain your reasoning for your answers 2-3 sentences

5.Question #4: Answer question, and explain why in 4-5 sentences

6.Question #5: Answer in 4-5 sentences

7.Add question #6: Did your dissolving time increase or decrease? Explain why this may have happened. Answer in 5-7 sentences

Friday 11/8/2013Entry Task/Warm-

Up• Please take your

notebook and your homework

IMPORTANT DATES!!• Stamp Sheet due

Wednesday/Thursday 11/13-11/14

• Notebook Check Next week!

• Chemistry Exam Friday!!

Homework:1. Stamp Sheet due

Wed/Thurs!

2. Chemistry Exam Friday 11/15/2013

3. NO SCHOOL MONDAY!

Schedule:• Periodic Packet due Tuesday

11/12/2013 for 30 Points

• Grade Check Today!


Tuesday 11/12/2013

IMPORTANT DATES!!• Stamp Sheet due Friday

11/18/2013!!

• Notebook Check Next week!

• Review Guide due Friday!!


Homework:1. Study your notes and

vocabulary!


Schedule:• Finish Periodic Table

packet!!• Due Today for 30 Points!!


Wednesday/Thursday 11/20-11/21

IMPORTANT DATES!!

• Stamp Sheet due Friday!!

• Notebook Check TODAY!

• Review Guide due Friday!!


Homework:1. Chemistry Review Guide

due Friday 11/15/2013 for 50 Points


Schedule:• Chemistry Unit Review

Guide


Friday 11/15/2013

Due Today:

• If you have not turned in your STAMP SHEET, please do so by the end of the period!

• Study Guides due Today!!

Homework:1. No homework today!

Schedule:• Chemistry Exam Today!!


monday october 28 th , 2013

Documents

total electrons

following elements

lewis structures reviewcheck

lewis structures reviewwrite

draw bohr structures

number of valence electrons

lewis structuresobjective

element symbol