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    Electronic Structure of Matter Activities

    Uploaded by

    joan marie Pelias
    1. The document describes three classroom activities related to electron configuration: the flame test, modeling electron probability distribution, and writing electron configurations. 2. In the flame test activity, students observe the characteristic colors emitted by heated metal salts and relate these to the structure of atoms. 3. The electron probability activity involves using a target with concentric circles to model electron distribution and probability in an atom. 4. The electron configuration activity asks students to write configurations for the third period elements and observe patterns in how electrons fill orbitals up to atomic number 18.

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    Electronic Structure of Matter Activities

    Uploaded by

    joan marie Pelias
    296 views6 pages
    1. The document describes three classroom activities related to electron configuration: the flame test, modeling electron probability distribution, and writing electron configurations. 2. In the flame test activity, students observe the characteristic colors emitted by heated metal salts and relate these to the structure of atoms. 3. The electron probability activity involves using a target with concentric circles to model electron distribution and probability in an atom. 4. The electron configuration activity asks students to write configurations for the third period elements and observe patterns in how electrons fill orbitals up to atomic number 18.

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    1. Electronic Structure of Matter Activities

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    1. The document describes three classroom activities related to electron configuration: the flame test, modeling electron probability distribution, and writing electron configurations. 2. In the flame test activity, students observe the characteristic colors emitted by heated metal salts and relate these to the structure of atoms. 3. The electron probability activity involves using a target with concentric circles to model electron distribution and probability in an atom. 4. The electron configuration activity asks students to write configurations for the third period elements and observe patterns in how electrons fill orbitals up to atomic number 18.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    296 views6 pages

    Electronic Structure of Matter Activities

    Uploaded by

    joan marie Pelias
    1. The document describes three classroom activities related to electron configuration: the flame test, modeling electron probability distribution, and writing electron configurations. 2. In the flame test activity, students observe the characteristic colors emitted by heated metal salts and relate these to the structure of atoms. 3. The electron probability activity involves using a target with concentric circles to model electron distribution and probability in an atom. 4. The electron configuration activity asks students to write configurations for the third period elements and observe patterns in how electrons fill orbitals up to atomic number 18.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 6

    Name:_____________________________ Year & Sec.

    :____________ Score:___________
    Teacher:___________________________ Date:___________________ Rating:__________

    Activity 1
    The Flame Test
    Objectives:
    a. determine the characteristic colors that metal salts emit; and
    b. relate the colors emitted by metal salts to the structure of the atom.

    Materials:
    0.50 grams of each of the following metal salts:
    Calcium chloride 6 pcs watch glass
    Sodium chloride 1 pc 10-ml graduated cylinder
    Copper(II) sulfate 1 pc dropper
    Potassium chloride safety matches
    Boric acid
    100 mL 95% Ethanol (or ethyl alcohol)
    100 mL 3 M hydrochloric acid

    Procedure:
    1. Place each metal salt on a watch glass and add 2 to 3 drops of 3 M
    hydrochloric acid.
    2. Pour about 3 - 5 mL or enough ethyl alcohol to cover the size of a 1 peso-coin
    in the first watch glass. Light with a match and observe the color of the flame.
    (This will serve as reference for comparison of the flame color). Wait for
    the flame to be extinguished or put out on its own.
    3. Repeat procedure No. 2 for each salt. Observe the color of the flame.
    4. Write your observation in a table similar to the one below.

    Table 1. Color of flame of metal salts

    Questions:

    Q1. Why do you think are there different colors emitted?

    Q2. What particles in the heated compounds are responsible for the production
    of the colored light?

    Q3. How did the scientists explain the relationship between the colors observed
    and the structure of the atom?

    Conclusion:
    Name:_____________________________ Year & Sec.:____________ Score:___________
    Teacher:___________________________ Date:___________________ Rating:__________

    Activity 2
    Predicting the Probable Location of an Electron

    Objective:
    Describe how it is likely to find the electron in an atom by probability.

    Materials:
    One sheet of short bond paper or half of a short folder
    pencil or colored marker with small tip
    compass
    graphing paper
    one-foot ruler

    Procedure:
    1. Working with your group mates, draw a dot on the center of the sheet
    of paper or folder.
    2. Draw 5 concentric circles around the dot so that the radius of each
    circle is 1.0 cm, 3 cm, 5 cm, 7 cm and 9 cm from the dot

    3. Tape the paper on the floor so that it will not move.


    4. Stand on the opposite side of the target from your partner.(Target is the
    center which represent the nucleus of an atom). Hold a pencil or
    marker at chest level above the center of the circles you have drawn.
    5. Take turns dropping the pencil or marker so that it will leave 100 dots on
    the circles drawn on paper or folder.
    6. Count the number of dots in each circle and record that number on
    the data table.
    7. Calculate the number of dots per square centimeter (cm2).
    8. Using a graphing paper, plot the average distance from the center on
    the x-axis and number of dots per sq.cm on the y-axis.

    Questions:
    Q1. What happens to the number of dots per unit area as the distance of the
    dots go farther from the center?

    Q2. Determine the percent probability of finding a dot in each of the circle
    drawn on the target by multiplying No. of dots /cm2 (column D) by the total
    number of dots (100). For example: In circle 1(A)

    Percent probability = No. of dots /cm2 X 100


    = [0.1920 / 100 ] X 100 = 19.20%

    Q3. Based on your graph, what is the distance with the highest probability
    of finding a dot? Show this in your graph.

    Q4. How many dots are found in the area where there is highest
    probability of finding dots?

    Q5. How are your results similar to the distribution of electrons in an atom?

    Conclusion:
    Name:_____________________________ Year & Sec.:____________ Score:___________
    Teacher:___________________________ Date:___________________ Rating:__________

    Activity 3
    Electron Configurations

    Objectives:

    bitals based on the given


    distribution for the first 10 elements; and

    Materials:
    Pen and paper
    Periodic table

    Procedure:
    1. Work with your group mates to write the electron configurations for the
    elements in the third period of the periodic table.
    2. Compare the electron configurations of the second period (see Table 3) and
    the third period elements.

    Questions:
    Q1. Do you see patterns in the distribution of their electrons?

    Q2. What are these patterns you have observed?


    Q3. What do you think are some rules that apply in filling up the orbitals
    for the elements from atomic number 1 to 18?

    Conclusion:

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