WAY BACK WEDNESDAY! (GEE Prep)

Catalyst – February 8*3, 2010 HW OUT1) The most important

nonspecific defense against pathogens is youra. Tears b. Mucusc. Saliva d. Skin

2) The swelling and pain associated with an inflammatory response are caused bya. Secretion of antibodiesb. Expansion of local blood

vesselsc. Secretion of antigensd. White blood cells

destroying bacteria

3) A protein that helps other cells resist viral infection is

a. Interferon b. Penicillinc. Predispose d. Histamine

4) A substance that triggers the specific defenses of the immune system is a (n)

a. Antibodyb. Antigenc. B celld. Pathogen

Today’s Agenda

Catalyst Graphing ABCs and Practice Atomic Size – Figure out the trends

with graphs! Work Time Exit Question (2nd Period: GEE Time)

HOMEWORK: ATOMIC SIZEGEE PACKET DUE FRIDAY!

TEST CORRECTIONS DUE FRIDAY!

Today’s Objectives

SWBAT graph like a rock star!

SWBAT determine the periodic trends for atomic size.

Front Door

Projector2nd Period

Group 3

Tyler, Johneisha,

Montronique, Marlon

Group 2

Quincy, Akiya,

Shante, Howard

Group 1

Annquinette, Sedric,

Keiara, Josh D.

Group 6

Angel, Erica, Josh T., Kayla

Group 5

Chris, Brandi, Durand, Angelica

Group 9Lashannia,

Heidi, Jeremiah,

Jacob

Group 8J’nae,

George, Tierra

Group 4

Taylor, Ashley, Tracy,

Alex

Group 7

Johnika, Rodneisha K.,

LaRatio

Front Door

Projector4th Period

Group 3

Kendall, Stephen,

Darneisha, Brittney

Group 2

Chasity, Adam, Jamal,

Cornell

Group 1

Raven, Desmond, Holloway,

Martha

Group 6

Jeanette, Selena, Quoc,

Thuy

Group 5Deston,

Mankisha, Katie,

Treshon

Group 4

Kevin, Tatiyaan,

Arthur, Brhea

Group 9

Haley, Frank, Taylor

Group 8Wilbert, Kenisha,

Jarion

Group 7

Celeste, Hannah, Jemeca

Front Door

Projector5th Period

Group 3

Gina, Timberly,

Jesse, Jasmine

Group 2

Natosha, James, Ida,

Felix

Group 1

Stephon, Paul, Tyler, Chyna

Group 6

Mikell, Justin, Breonne, Chassidy

Group 5

Rikki, Aujuan, Jandolyn,

Breionna H.

Group 4

Mason, Brianna M.M

Nathan, Mario

Group 9Group 8

Qiana, De’Jonel, Desman

Group 7

Maghan, Granville,

J’Don, Dominique

On to the real stuff!

GRAPHS AND CHARTS are ALL OVER the GEE and ACT

Being able to interpret them is a skill you need to DOMINATE these tests!

Many newspapers and magazines will put data in different kinds of texts and you need to practice how to read them!

Why do scientists use graphs?To organize, compare, and display experimental data

To make calculations and predictions

Old Notes on Graphing…

When looking at a graph, always determine:

1. What question was the scientist was trying to answer?

2. What conclusions can be made from the graph?

3. What future experiments could be done?

What the Chemistry Studs need to say to Mr. LY’s Classes….

How to Graph (Copy steps down!)

Key Point #1: To graph… Label axes (x = IV, y = DV) Title graph (y-axis vs. x-axis) Determine scales (using data

ranges) Plot each point (x,y) Draw trend line (line of best fit)

(use a ruler)

Review!

Valence electrons are…? Electrons in the outermost energy level

Graph One – Practice!

Number of Valence Electrons vs. Family on the Periodic Table What’s the x-axis? What’s the y-axis? Let’s make a table of data first!

Valence Electrons vs. Family

Family on the Periodic Table (x-axis)

Number of Valence Electrons (y-axis)

Alkali Metals (1)

Alkaline Earth Metals (2)

Boron’s Group (13)

Carbon’s Group (14)

Nitrogen’s Group (15)

Oxygen’s Group (16)

Halogens (17)

Noble Gases

12

34

5

6

78

What is Atomic Size?

Atomic size is… How big an atom is Also known as atomic radius

radius

Graphing Atomic Size (Radii)Draw 2 line graphs (one with Ms. Stroh, one totally on your own!) x-axis: Element y-axis: Atomic Radius (picometers)

Elements and their Atomic Radii

Element

(x-axis)

Atomic Radius

(picometers)

(y-axis)

Hydrogen 37

Lithium 152

Sodium 186

Potassium

227

Rubidium 248

Cesium 265

1 picometer = 1 x 10-12 m Element

(x-axis)

Atomic Radius

(picometers)

(y-axis)

Lithium 152

Beryllium

112

Boron 85

Carbon 77

Nitrogen 75

Oxygen 73

Fluorine 72

Neon 71

1 2

How to make a good scale??1. Determine the smallest and the biggest

number in the data set (data range) In Table 1, these numbers are 37 and 265

2. Count the number of lines available on graph paper

In this case, we have???

3. Make a break if data is FAR AWAY from zero!

4. Divide the data range into even intervals Go by 1s, 2s, 5s, 10s, 50s, 100s, etc… You want numbers that can easily be divided into

parts (halves, thirds, fourths)

Atomic Size – Graph 1

0

50

100

150

200

250

300

350

0 1 2 3 4 5 6 7

Element

Ato

mic

Ra

diu

s (

pic

om

ete

r)

Li

H Na K Rb Cs

Atomic Size – Graph 2

0

20

40

60

80

100

120

140

160

0 2 4 6 8 10

Element

Ato

mic

Ra

diu

s (

pic

om

ete

r)

Li Be B C N O F Ne

What trend(s) do

you notice?

Atomic size DECREASES as you go left to right across the PTA

tom

ic size IN

CR

EA

ESE

S a

s you g

o

dow

n th

e P

T

Atomic Size Trend

Key Point #2: Atomic size increases as you go down the periodic table and decreases as you go left to right across the periodic table.

Practice Problems

Rank the following elements in order of increasing atomic size based on location on the periodic table (smallest to biggest)

Fr, Sc, P, Pd

F, As, Tl, S

P, Sc, Pd, Fr

Fluorine, Sulfur, Arsenic, Thallium

Practice Time!

1. T or F? Atomic size decreases as you move right across the periodic table.

2. T or F? As you move down the Periodic Table, atoms get smaller.

3. Rank the following sets of elements in order of increasing atomic size (small big).

Set A: Bh, Mn, Re, Tc Set B: Sb, I, Ag, Ru Set C: Y, Ti, Sg, Ta

4. Rank the following sets of elements in order of decreasing atomic size (big small).Set A: Cl, At, I, F, Br Set B: Te, Xe, Sn, In

Set C: Rb, K, Sr, Ca

Add to BACK of Homework Paper! Copy the

following table onto your paper and graph the data

Use a ruler to make straight axis lines!

Study Time

(minutes)

Score on Test

(Percentage)

10 3322 4635 6167 8593 95

Exit Question

1. What is atomic radius?2. Why does Phosphorus have

a larger atomic radius than Nitrogen?

3. Why does Fluorine have a smaller atomic radius than Lithium?