What are the three classes of elements and how are they arranged in the modern periodic table? 2. What type of ions are
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I. Introduction
1.
What are the three classes of elements and how are they arranged in the modern periodic table?
2.
What type of ions are formed by metals and nonmetals?
3. What were the objectives of this experiment?
What were the three families of elements studied in this experiment?
5. What tests were performed to study the properties and reactivity trends of these elements?
6. What were the chemical and procedural hazards in this eyneriment and safety orecautons
Imo emented to avoid these nazards
I. Results Analysis
A. Data and Calculations
B. Discussion
Part | Physical Properties and lons of Common Periodic Families
What physical similarities did you observe among Group 1A, 2A and Transition element
samples in Part I?
What type of ions were formed by metals and non-metal elements?
What type of compounds are made between cations and anions?
Part I Analysis of Known Solutions: Chemical Properties
A. Flame Test
1. What is flame test and how was it performed? Briefly explain.
2. What elements/ions were subjected to the flame test? How was the flame color
observed?
3. What ion makes the flame test misleading and how was it removed?
4. What were the characteristic flame colors of alkali and alkaline earth metal?
Can you conclusively identify the Group 1A and 2A elements using the flame test?
Why or Why not?
Solution Reactions
What test reagents were used and what positive reaction result was noted for each
element/ion?
2. Which family or group showed a positive precipitation test?
3. What is the importance of this test in differentiating Group 1A elements from Group
)A
C. Halide Test
1. What test reagents were used and what positive reaction result was expected for
each halide ion?
2. What were the characteristic hexane layer colors of the three halide solutions
toctod
Part Ill Analysis of Unknown Solution
1. What was the unknown number assigned to your group?
2. What was the flame color of the unknown solution when placed in a flame?
3. What element/ion was present in the unknown solution?
4. How did the unknown solution respond to the precipitation/solution reaction test?
5. Based on the result, which family did the element/ion in the unknown belong?
6. What test was useful in determining the cation unknown solutions?
7. Based on the color of the hexane layer, what halide ion did the unknown contain?
8. What was the chemical name and formula of vour unknown solution?
III. Conclusions
1. Based on your observations from the tests your group performed, can you conclude that
families of elements exhibit similarities in properties?
2. Which test(s) can be used to specifically identify the element/ion and which one(s) can be used
to identify the elements in the same family? Briefly describe.
3. What test was used to difterennate groun 14 from 24 in both known and unknown solutions?
4. Was the halide test known results useful in determining the identity of your unknown solution?
5. What was the chemical name and formula of your unknown solution?
6. Were there any difficulties encountered in this experiment? Briefly explain and provide
recommendanons for improvement.
What similarities in properties did you observed? Overall, what can be concluded about the
similarity of chemical properties of elements in the same family or group? Briefly summarize.
8. What is the practical application of this experiment! Give an example.
