Download Name: Date: Period: ______ Graphing Periodic Trends Purpose:To

Name: _____________________________________________ Date: ______________ Period: ________
Graphing Periodic Trends
Purpose:To investigate and explain periodic trends in atomic radius, first ionization
energy, metlingpoint and denisty of elements on the periodic table.
Procedure:
1. Using the attached data table, you will create 3 separate graphs. Choose your
three from the following list:
A. Atomic Radius vs. Atomic Number
B. Ionization Energy vs. Atomic Number
C. Melting Point vs. Atomic Number
D. Density vs. Atomic Number
2. Answer the appropriate questions from the following list. Choose those that
apply to the graphs you made.
A. For each graph, NEATLY label each set of data points that represent a group or
family.
B. Discuss the shape of one of the graphs.
a. What trend(s) is/are apparent?
b. Does the graph support the statement that atomic radius is a periodic
property?
C. Do you see any relationships between the graphs of the 3 properties you
highlighted in your graphs?
3. Attach your graphs and responses to this packet. PLACE WHATEVER YOU HAVE
FINISHED in the homework bin.
4. Take a Homework handout. This assignment is due Monday 4/2/12
Name: _____________________________________________ Date: ______________ Period: ________
Periodic Trends Homework: Using general knowledge, a textbook, or any other resource,
identify the following 40 mystery elements. Place each letter (A-Nn) in the appropriate
box in the blank periodic table provided. Be careful – do not use the actual symbol for the
element, and don’t get them confused when filling outthe periodic table!
1.
2.
A, B, C, and D are all members of a group and are all gases.

A is familiar to you because of its use

in red advertising signs.

B is produced in abundance on the sun.

C, surprisingly, formscompounds with fluorine and oxygen.

D is the most abundant of these and makes up approximately 1% of air.
E and F are in the same group. E is diatomic and is comprises 78% of air. F is a
poisonous metalloid; some of its compounds are used in murder mysteries and
insecticides.
3.
G, H, and I are very active metals. All form chlorides with formula XCl.
 G is in the first period that contains 18 elements.
 H has the highest ionization energy in the group.
 I has a very lowionization energy and is not radioactive.
4.
5.
J, K, and L are in another family of metals.

J is found in bones and teeth.

You see K as the bright white flash in fireworks and in old camera flash bulbs.

L is used in medical imaging procedures as well as in green fireworks.
M is a unique diatomic element that has properties similar to elements in both
Group 1 and Group 17.
6.
N, O, and P are in the same group and form (-1) anions when combined with metals.

N is a liquid at room temperature.

O is a soft, purple solid with a high vapor pressure used in disinfectants and
found in high concentrations in seaweed (“nori”); it is added to table salt to
promote healthy thyroid function.

P is the most chemically reactive nonmetal.
Name: _____________________________________________ Date: ______________ Period: ________
7.
Q, R, S, and T are in the same period.

Q is a greenish-yellow gas used to purify water.

R is a nonmetallic solid that exists in red and white elemental forms and is
used in matches.

S is a metalloid used in transistors that is so important industrially that a
valley is named for it.

T is a low density metal used for aircraft, cooking utensils, and household
foil.
8.
U, V, W, X, and Y are d-block elements.

U is an excellent conductor and is used to make household water pipes and
electrical wiring. V is a liquid at room temperature.

W is mined in the largest quantity and is used extensively in construction.

X is a soft, yellow metal, an excellent conductor of heat and electricity, and
is used in expensive jewelry.

Y has the highest melting point of all elements and is used in light bulb
filaments.
9.
Z is named for the creator of the periodic table.
10. Aa is named for the philanthropist who funded aprestigious yearly scientific prize
using money earned from the explosives industry.
11. Bb, Cc, and Dd were all named for planets, but the planet for which Cc was named is
now no longer considered to be a planet. Of these three elements, only Dd is naturallyoccurring and it is also an alpha decay product of Cc. They were all discovered at the
University of California at Berkeley. Isoptopes of Bb are beta decay products of Dd.
12. Ee, Ff, and Gg are in the same group. Ee is a soft, very dense metal used to shield
patients from Xrays but NOT used in sandwiches with jam or in pencils. Ff comes in a
variety of elemental forms with widely differing properties, one used as a fuel, one in
very expensive jewelry, and one in lubricants and pencils. Gg is a brittle, lightweight
metal, resistant to corrosion and used in toothpaste, but is no longer used in household
foil.
13. Hh, Ii, and Jj are in the same period.

Hh is the least dense metal and was named for the home country of the
scientist who coined the term “radioactivity” and also first explained the
Name: _____________________________________________ Date: ______________ Period: ________
phenomenon; she later died as a result of radiation poisoning. (Kk is named after
her, and LL, the most reactive metal, for her adopted country.)

Ii is a colorless, odorless, tasteless, naturallyoccurring gas which finds its way
into basements and may be linked to cancers.

Jj is considered to be the “last” (highest atomic number) naturally-occurring
element; it forms beautiful crystals and is used in that pink stomach-ache
medicine that makes your tongue turn black.
14. Mm was named for the Norse goddess of beauty, because of the wide variety of
beautiful colors that contain this early transition-metal element.
15. Where on earth did all the Nn go? It looks as though it ought to be naturally-
occurring, but,apparently, it isn’t. As the lightest (lowest atomic number) element
without a stable isotope, its properties were predicted long before the element was
synthesized.
16. Predict the formulas of the ionic compounds formed by the following
combinations of the mystery elements:

M and P

T and Q

E and M

I and R

A and G

J and N

T and R

V and O
17. Write a brief conclusion to this activity, typed on a separate sheet of paper.
Attach your proposed periodic table to it! Use the TEXT format to make sure your
answer is complete.