Triad in Classification Of Elements- The Periodic Table – Class 10 Science Experiment

Chapter Name: Classification Of Elements- The Periodic Table

Activity Name: Triad in Classification Of Elements- The Periodic Table

Activity Description:

In this activity, you will explore the concept of triads in the Periodic Table. Triads are sets of three elements with similar chemical properties, where the atomic weight of the middle element is approximately equal to the average of the atomic weights of the first and third elements in the row. You will examine various rows in the Periodic Table and determine if the triad relationship holds true.

Required Items:

Periodic Table (either a printed version or access to an online resource)

Step by Step Procedure:

  1. Observe the given table, which contains rows of elements representing triads.
  2. Start with the first row and identify the atomic weight of each element (Li, Na, and K).
  3. Calculate the average of the atomic weights of the first and third elements (Li and K) in the row.
  4. Compare the calculated average with the atomic weight of the middle element (Na).
  5. Repeat the process for the remaining rows and verify if the triad relationship is consistent throughout.

Experiment Observations:

  • In the first row, you will observe that the atomic weight of sodium (Na) is equal to the average of the relative atomic weights of lithium (Li) and potassium (K).
  • Continue examining the other rows and check if the same relationship holds true for the remaining triads.

Note down your observations in table format:

Triad in Classification Of Elements- The Periodic Table - Class 10 Science Experiment

Precautions:

  1. Ensure the accuracy of atomic weights taken from the Periodic Table.
  2. Double-check calculations to avoid errors in determining the average atomic weights.

Lesson Learnt from Experiment:

The activity demonstrates that certain sets of elements in the Periodic Table form triads, where the atomic weight of the middle element is approximately equal to the average of the atomic weights of the first and third elements in the row. This relationship highlights the periodicity and organization of elements in the Periodic Table based on their properties.

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