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Periodic Law Lab Report

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Pre-lab discussions
The arrangement of the periodic table is according to the periodic law. The periodic law states that arrangements of the elements are in order of increasing atomic number with both their chemical and physical properties showing a periodic pattern. Students through carrying of laboratory experiments discover these properties of elements in the periodic table. Major properties to be examined are first ionization energy, atomic radius, physical and chemical properties.
Purpose
To understand periodic trends as it relates to atomic radius, first ionization energy, physical and chemical properties of elements.
Equipments and Materials
8 test-tubes Aluminum (Al)
Magnesium (Mg) Silicon (Si)
Bunsen burner …show more content…
Obtain the sample of the elements that are listed in the materials.
2. Observe each element and record the observations in a date table. Physical observations to be recorded include color, luster malleability etc.
Part II: Chemical properties
1. Obtain 8 test tubes of medium size. Use labeling tape in labeling the 4 test tubes i.e Al, Mg, Si, and S: Indicate that the labeled test tubes contain distilled water. In the other 4 test tubes, indicate that the test tubes will contain HCl and label them using the same element names.
2. Add about 1cm of distilled water to each of the 4 labeled test-tubes. Carefully add the following to each of the labeled test-tube and make an observation of the chemical changes.
• 1 ribbon of magnesium
• 1 strip of aluminum
• 1 large chip or 2-3 small chips of silicon
• 2-3 chips of sulfur
3. Record observations as from step 2 in the data table. The changes to be recorded include change in color, formation of gases, change in temperature, e.t.c
4. To the other 4 acid labeled test-tubes, add 1 cm of 3-M HCl and record the observations in the data

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