Graph Analysis / Atomic Number vs. Atomic Radius
DO NOT leave the Trend 1
or Trend 2 boxes empty. A
response will be needed
described at the bottom of
this page.
Name ________________
Trend 1:
Trend 2:
For PART 3 of this assignment, discuss element atoms from
this area that were NOT included in the graph.
2.0 Target: Describe the organization and features of the periodic table
PART 11 COLOR CODING
Do steps 1 – 4 below on the blank periodic table above using a regular table for reference.
1. With a BLUE COLORED PENCIL, write in the symbols for Lithium through Neon.
2. With RED, write in the symbols for Sodium through Argon.
3. With GREEN, write in the symbols for Potassium through Krypton.
4. With YELLOW, write in the symbols for Rubidium and Strontium
PART 2 ASSOCIATING THE TRENDS VISIBLE ON THE LINE GRAPH BACK TO THE
PERIODIC TABLE
1. Take out the LINE GRAPH you made earlier showing atomic number versus atomic radius.
2. Using the colors from PART 1, circle each symbol on your graph using the matching color.
3. Along the top and left side of the periodic table above, there are boxes where you need to
describe the trend observed for the change in atomic radius. Study BOTH the line graph AND
the periodic table above side-by-side.
4. Trends observed for the change in the Atomic Radius of atoms. In the spaces marked
"Trend 1" and "Trend 2" at the top of this page, do the following:
Trend 1: Describe the trend you find when going LEFT-TO-RIGHT along a PERIOD (row)
Trend 2: Describe the trend you find going from TOP-TO-BOTTOM in a GROUP (column)
PART 3 APPLYING THE ATOMIC RADIUS TRENDS TO OTHER ELEMENTS
Citing evidence from the graph, address the following claim: "Atoms that have a greater mass
must be physically larger in size." For example, given the elements Gold, Lead, and Osmium,
one might say that Lead is the heaviest and therefore physically larger than Gold or Osmium.
Furthermore, Osmium is lighter than Gold or Lead and must therefore be physically smaller.
Argue for or against this claim citing evidence from the line graph.
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3.0 Target: Identify the relationship between the structure of the atom to the organization
and features of the periodic table.
DETAILS ABOUT THE ELECTRON CLOUD STRUCTURE OF DIFFERENT ELEMENTS
Included in this packet is a periodic table which shows the structure of the electron cloud. The
key below shows where the electron cloud data is found:
Use the data about the electron cloud structure
found in this periodic table to complete Part 4
and Part 5 of this packet.
The top number is the energy level
closest to the nucleus.
PART 4
ELECTRON ARRANGEMENT VERSUS ATOMIC RADIUS
Number of Energy Levels Needed to Hold Electrons
NOTE:
The shaded boxes
must get filled in with
numbers during
PART 4
1
2
3
4
Period Numbers
5
6
7
1. Record how many energy levels the atoms have for each of the elements in the shaded spaces above.
2. Each PERIOD (row) on the periodic table is assigned a number, and this number has meaning. What does the period
NUMBER represent on the periodic table AND how does this number help to explain trend # 2 described on page one of
this packet?
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NOTE:
The shaded boxes
must get filled in with
numbers during
PART 5
Number of Electrons in the Outer-Most Energy Level
18
1
2
Group Numbers
13
14
15
16
17
PART 5 TAKE IT ONE STEP FARTHER - ANOTHER IMPORTANT PATTERN!!
1. Using the periodic table you got with this packet, focus your attention on the OUTER (farthest) energy level only.
Look for trends in the NUMBER OF ELECTRONS held in the OUTER energy level. Record the NUMBER OF OUTER
ELECTRONS for the elements in the shaded spaces above.
2. Each GROUP (column) on the periodic table is assigned a number (only some shown at this time), AND this number
has great meaning. What do these group NUMBERS represent on the periodic table for the groups shown?
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