Name: _____________________________________________________________________

MODS: _________________________

UNIT 3 - ATOMIC THEORY

Date Agenda Homework

Mon10/1 Introduce Atomic Structure

read p 107-112do # 1-3 p 108 and #4-6 p 112Poster Project

Tues10/2

Quiz – Symbols 1-20+ n eValence Electrons/Dot Diagrams

Work on Postersread p 113-119worksheet

Wed10/3

Review basic atomic structuremake atomic structure cards

Work on Posters

Thurs10/4

Quiz -basic atomic structure poster presentationsIntroduce ions

Ions - worksheet

Fri10/5

Go over quizReview ionsIntroduce Isotopes

Read p 115-120do # 18-26 p 121

Mon10/8

Lab - Beanium study for testread

Tues10/9

Go Over labWeighted average atomic mass calculationsReview for test

Study for the test

Wed10/10

1/2 dayReview for test

Thurs10/11

Test - Chapter 3

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CHEMISTRY SYMBOLS TO KNOW

ALUMINUM ANTIMONY

ARGON ARSENIC

BARIUM BISMUTH

BORON BROMINE

CADMIUM CALCIUM

CARBON CESIUM

CHLORINE CHROMIUM

COBALT COPPER

FLUORINE FRANCIUM

GOLD HELIUM

HYDROGEN IODINE

IRON KRYPTON

LEAD LITHIUM

MAGNESIUM MANGANESE

MERCURY NEON

NICKEL NITROGEN

OXYGEN PHOSPHORUS

PLATINUM POTASSIUM

RADIUM RADON

SILICON SILVER

SODIUM STRONTIUM

SULFUR TIN

TITANIUM TUNGSTEN

URANIUM XENON

ZINC BERYLLIUM

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SYMBOLS POSTER

Each student will be assigned an element to research. The posters will be due on THURSDAY OCTOBER 4TH and will be presented to the class on that day. The posters will count as a lab grade.

Make sure to include the following: Name of element Symbol of element Atomic number of element Atomic mass of element

o Number of protonso Number of electronso Number of neutrons

Five interesting facts about the element On colored 8 ½ by 11 paper Use at least 3 different colors Name on BACK of poster Neatness and creativity count!!

These posters will be displayed around the room for everyone to view…do an awesome job!!!

Rubric:Category Points Possible

Name of element ………………………………………… 0 3Symbol of element………………………………………. 0 3Atomic number of element……………………………… 0 3Atomic mass of element………………………………… 0 3Five interesting facts about the element………………. 0 # x 2= ___On colored 8 ½ by 11 paper…………………………….. 0 3Use at least 3 different colors…………………………… 0 2 4 6Name on BACK of poster………………………………. 0 2Neatness and creativity count!!.......................................... 0 4 7 10

Total Points Earned: ______________

Total Points Available: 43

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Name ____________________________________________ Date ________________

ATOMIC STRUCTUREWORKSHEET #1

DEFINITIONSAtomic Number

The number of protons in the nucleus of an atom of an element

Atomic Mass

The weighted average of the masses of the isotopes of an element

Mass Number

The total number of protons and neutrons in the nucleus of an atom

FILL IN THE TABLE BELOW

Element Atomic Numbe

r

Atomic Mass

Mass Number

# of Protons

# of Electron

s

# of Neutron

sAluminum 27

9 1920 10

Calcium 405 11

35 17Iodine 127

12 2465 30

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Name ____________________________________________ Date ________________

Worksheet #2: IONS

NameSymbo

l

Atomic

Mass

Atomic

Number

Mass

Number

Charge

Protons

Neutrons

Electrons

Na+1 12

17 36 -1

39 19 18

Argon 40 18

5 5 2

7

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Name ____________________________________________ Date ________________

Worksheet #3: Isotopes

Percent abundance 1. The mass of element X has a 78.99% abundance for isotope 23.9850, 10.00% for isotope

24.9858, and 11.01% for isotope 25.9826 . What is the atomic mass of the element? What element is it?

DO NOW…CHECK ANSWERS IN PACKET2. An element is a mixture of two isotopes. One isotope of the element has an atomic mass

of 34.96885 and has an abundance of 75.53%. The other isotope has an atomic mass of 36.96590. Calculate the average atomic mass and identify the element.

3. An element consists of 1.40% of an isotope with mass 203.973, 24.10% of an isotope with mass 205.9745, 22.10% of an isotope with mass 206.9750, and 52.40% of an isotope with mass 207.9766. Calculate the average atomic mass and identify the element.

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Name ____________________________________________ Date ________________

Lab: BEANIUMTerminology:

Define ELEMENT-

Define ISOTOPE-

Lab:Researchers have identified a new element, beanium. All atoms of the element beanium are very large. Therefore, sorting the isotopes of this element should be accomplished with very little difficulty.

Obtain a container of beanium atoms. The difference between the isotopes of this element can be easily see. Each different type of bean represents a different isotope.

Data:

Part A: Straight Percent Calculation

Total mass of all beans: __________gTotal number of all beans__________Average mass of a beanium atom: total mass

total number

Part B: Weighted Average Calculation

Separate the isotopes:

Isotope Total mass Number Average Mass

Percent Abundanc

e12345

**Average mass of each isotope:                 total mass of isotope         number of atoms of the isotope **Percent Abundance of Each Isotope: number of atoms of isotope

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total number of beanium atoms

Isotope Average Mass Percent Abundance Weighted Atomic Mass12345

Compare the value for the straightforward average with the weighted average (**hint they should be the same)

Problems: Average Atomic Mass

What is the atomic mass of silicon if 92.21% of its atoms have a mass of 27.977 u, 4.70% have mass 28.976 u and 3.09% have mass 29.974 u?

Find the average atomic mass of silver if 51.83% of the silver atoms occurring in nature have mass 106.905 u and 48.17% of the atoms have mass 108.905 u.

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Name ____________________________________________ Date ________________

Worksheet #4 ~ ReviewATOMIC STRUCTURE

You may use the following answers more than once:a. isotope b. atomic number c. atomic mass number d. protone. electron f. neutron g. nucleus h. ion

_____1. Has a positive charge

_____2. Where the proton is found

_____3. Is the sum of the neutrons and the protons

_____4. An element with different number of neutrons

_____5. Has no charge

_____6. Where the neutron is found

_____7. Is the lightest particle

_____8. Has a charge of –1

_____9. Elements with different number of electrons

_____10. The number of protons in an element

_____11. Particle that distinguishes the elements from one another

_____12. Particle found outside the nucleus

Fill in the table:

Name Symbol

Protons

Neutrons

Electrons Charge

AtomicMass

Number

AtomicNumber

-3 3115

5 511

Nitrogen10 14

19 2018

Mg+2 12

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Representing Atomic Structure:Draw the picture that represents the atom 39K.

Atomic number = Atomic mass =Mass number =

# of protons =# of electrons =# of neutrons =

Draw the dot diagram:

Would you expect 39K to be stable or reactive? Give reasons why and explain the octet rule.

Would you expect 39K to become ion? Why?

If you expect 39K to become an ion, would it become positive or negative? Why?

Calculate the average atomic mass for oxygen to the thousandth place:

What is the average atomic mass for oxygen? _____________________________

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O-16 O-17 O-18Average massof isotope 15.995 16.995 17.999

% abundance 99.759 % 0.037% .207%

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