: Zodiac Periodic Table Activity - WARNER'S SCIENCE WEBSITE

SCH 3U

Name: _________________

Zodiac Periodic Table Activity

You are the science officer on the first spaceship to explore a planet in a faraway solar system. Unfortunately your equipment is very limited. You have the following apparatus to test the rock and mineral samples which have been brought back from this planet:

a science kit containing a set of chemicals marked C1, C2, C3, and C4

an instrument for measuring the atomic mass of an element

an instrument for measuring the melting point of a solid

an instrument for measuring the density of a substance

After an extensive study, you have isolated and purified 11 elements, and suspect there is a 12th undiscovered element. They are all different from those on Earth (remember this is science fiction!). As you isolate each element you assign it a name and a symbol based on the signs of the Zodiac. You determine their atomic masses, melting points, density, and how they react to the four chemicals in the science kit. You also try to react each of the elements with oxygen. Elements that form an oxide are analyzed to find the chemical formula (relative number of atoms of each new element and oxygen). This data is listed below on a separate page.

Method:

1.

Cut out the rectangles.

2.

Look at the properties listed on each rectangle. Some are physical and others

chemical. Certain elements have similar chemical properties. Place these groups

or families of elements in separate piles. You should find that you have four groups

or families of elements.

3.

Look for the element which has the smallest atomic mass. This should be placed in

the upper left of your periodic table. The remaining elements in this group are to be

placed below this element in the periodic table. The greater the atomic mass the

lower in the periodic table.

4.

Now look through the remaining three groups or families and find the element

with the next lowest atomic mass. This will be placed at the top of the second

group in the periodic table.

5.

Again place the rest of the elements of this group below this element making sure

that the lower in the periodic table the greater the atomic mass. Continue until all

elements have been placed in the periodic table.

6.

Make sure that as you proceed from left to right and as you proceed from top

to bottom the atomic mass always increases. If any element is out of order

make sure you place it in the correct order. MAKE SURE YOU DO NOT REMOVE

AN ELEMENT FROM ITS CORRECT FAMILY (GROUP)!!!

7. Have you teacher check your periodic table, especially if you have any questions. On your periodic table write the numbers #1, #2, #3 etc. in order from the smallest atomic mass to the largest atomic mass. This is the atomic number of each element.

Questions:

1.

Plot the density of the elements that you have discovered on a graph. Density is to

be on the vertical axis (left hand side) and the atomic number on the horizontal

axis. Make a line graph of density vs. atomic number. (5 marks)

2.

Describe how the density of each element changes with atomic number both

horizontally and vertically. (2 marks)

3.

Plot the melting point of each of the elements you have discovered on the same

graph using another symbol. The melting point is to be on the vertical axis at the

right hand side. Make a line graph of melting point vs. atomic number. This second

line is to be drawn with a different colour/pattern and a legend is to be included on

your graph. (5 marks)

4.

Compare the trend in the melting point with the trend in the density that you

described in question 2. (3 marks)

5.

You have not received a rock or mineral containing a sample of the last element.

Even though you do not have a sample of this element, predict the probable

physical and chemical properties and complete the table below. Refer to the

properties of neighbouring elements and the trends you identified in questions 2

and 4. (5 marks)

NAME OF ELEMENT SYMBOL ATOMIC NUMBER ATOMIC MASS DENSITY COLOUR MELTING POINT FORMULA OF OXIDE REACTION WITH CHEMICAL C1 REACTION WITH CHEMICAL C2 REACTION WITH CHEMICAL C3 REACTION WITH CHEMICAL C4

Virgo Vi

Symbol: Sa Atomic Mass = 25.1u Melting Point = 250?

A silver solid Density = 4.1 g/cm3 Formula of Oxide: Sa2O

Reacts with both C1 and C2 to produce a white precipitate.

Symbol: So

A grey solid

Atomic Mass = 14.1u Density = 3.0 g/cm3

Melting Point =160? C Formula of Oxide: So2O

Reacts with both C1 and C2 to produce a white precipitate.

Symbol: Tu

A grey solid

Atomic Mass = 20.9u Density = 5.0 g/cm3

Melting Point = 330oC Does not form an oxide.

Does not react with C1, C2, C3 or C4.

Symbol: Pi Atomic Mass = 6.2u

A blue solid Density = 2.7 g/cm3

Melting Point = 200? C Formula of Oxide: PiO

Reacts with both C2 and C4 to produce a coloured solution.

Symbol: Le Atomic Mass = 29.1u Melting Point = 380? C

A red solid Density = 5.0 g/cm3 Formula of Oxide = Le2O3

Reacts only with C3 to produce a yellow-red solution.

Symbol: Lb

A green solid

Atomic Mass = 27.2u Density = 4.5 g/cm3

Melting Point = 320? C Formula of Oxide = LbO

Reacts with both C2 and C4 to produce a coloured solution.

Symbol: Aq

A yellow solid

Atomic Mass = 9.4u Density = 3.1 g/cm3

Melting Point = 250? C Formula of Oxide = Aq2O3

Reacts only with C3 to produce a yellow-red solution.

Symbol: Ai

A black solid

Atomic Mass = 11.4 u Density = 4.0 g/cm3

Melting Point = 290? C Does not form an oxide.

Does not react with Cl, C2, C3, or C4.

Symbol: Cn

A silver solid

Atomic Mass = 32.3u Density = 6.1 g/cm3

Melting Point = 400? C Does not form an oxide

Does not react with Cl, C2, C3 or C4.

Symbol: Cp

A white solid

Atomic Mass = 3.1u Density = 2.5 g/cm3

Melting Point =100? C Formula of Oxide = Cp2O

Reacts with both C1 and C2 to produce a white precipitate.

Symbol: Gm

A turquoise solid

Atomic Mass = 16.5u Density = 3.5 g/cm3

Melting Point = 250? C Formula of Oxide = GmO

Reacts with both C2 and C4 to produce a coloured solution.

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