I Want to Be Like You-oo-oo!!
Oh, oobee-doo
I wanna be like you-u-u
I wanna walk like you
Talk like you, to-oo-oo-oo
You'll see it's true
An element like me-e-e
Can learn to be a gas….like you toooo-oo
(badly modified from Disney’s ‘Jungle
Book’)
Criteria for Write-Up
Introduction:

How is the periodic table arranged?

What are the in-common properties of the periods (rows)

What are the in-common properties of the groups (columns)

Why are we interested in the valence electrons associated with each of the elements

Does the periodic table provide us with any patterns when it comes to valence electrons?

What are ionization energy, electron affinity, electronegativity and effective nuclear charge?

What patterns do we see in each of the above trends
Results:
Alkali Metals

What differences were observed in both the physical properties and reactivity of the alkali metals?

Arrange the alkali metals in order of reactivity and apply a scale of 1-6 for each of the metals
Lithium
Sodium
Potassium
Rubidium
Cesium
Alkali Metal
Alkaline Earths: pH_Conductivity
Alkali Metal Compound
Mg(OH) s
Ca(OH) s pH properties Reactivity (1-6)
Conductivity

Alkaline Earth : Solubility a.
Barium chloride solution, BaCl
2
, b.
Ammonium oxalate solution, Na
2
C
2
O
4 c.
Calcium chloride solution, CaCl
2 d.
Potassium iodate solution, KIO
3 e.
Magnesium chloride solution, MgCl
2 f.
Sodium carbonate solution, Na
2
CO
3 g.
Strontium chloride solution, SrCl
2 h.
Sodium sulfate solution, Na
2
SO
4 i.
Add 1 mL of an alkaline earth metal chloride solution to each well in a horizontal row, as follows:
• magnesium chloride to wells A1–A5
• calcium chloride to wells B1–B5
• strontium chloride to wells C1–C5
• barium chloride to wells D1–D5 ii.
Add 1 mL of testing solution to each well in a vertical column, as follows:
• potassium iodate to wells A1–D1
• sodium sulfate to wells A2–D2
• ammonium oxalate to wells A3–D3
• sodium carbonate to wells A4–D4

Halogens: physical properties
Halogens
Chlorine (Cl
2
)
Bromine (Br
2
)
Iodine (I
2
)
Physical State
Halide Salt
Potassium Chloride (KCl)
Potassium Bromide (KBr)
Potassium Iodide (KI)
Toggle setting on probe
Halogens: Single displacement Reactions between halogens and halide salts
Test Tube
Halogen
Sodium Halide Solution
Evidence of a reaction
(color change?)
1
Cl
2
NaBr
2
Cl
2
NaI
3
Br
2
NaCl
Color
Conductivity
4
Br
2
NaI
I
5
2
I
6
2
NaCl NaBr

Discussion:

Describe any trends you observed among the Alkali metals, Alkaline Earths and Halogens in each of the above categories of exploration.

Provide in-depth explanations for what might account for any patterns you observed going down a group or across the period (looking at conductivity values for the IIA and VII elements might be helpful here). Include the following in your explanation:
Differences in atomic size
Differences in ionization energy
Differences in electronegativity
Differences in effective nuclear charge
 Write complete and balanced equations for the double displacement reactions you observed in the reaction plates when you were looking at solubility.
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 Write complete and balanced equations for the single displacement reactions you observed in the test tubes.
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