Summarize the concepts about electron configurations

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Reference no: EM132463716 , Length: 2 pages

Extending the Periodic Table

Pekka Pyykko at the University of Helsinki has predicted the position of elements up to 172. In this investigation, you will make predictions about the electron configurations of these large elements.

Pre-Lab Questions:

PLQ1. List the order in which sublevels are filled in element 118.

PLQ2. If g is the next sublevel after f, what are the next three sublevels to be filled after 7p if the relative energies of atomic orbitals is 6d < 7p < 5g < 6f < 7d < 8p.

Question: How should 172 elements be arranged in the periodic table?

Organize the Data

a. Complete shorthand electron configurations for elements 118 to 172.

b. Arrange these elements into groups so that they can be placed into the current periodic table. What criteria will you use?

c. Place these groups into the current periodic table. Redraw your table that now includes all 172 elements.

Analyze and Interpret
a. Describe the changes in the length of the periods and groups in each of the s, p, d, and f blocks of the periodic table.

b. Describe the properties of the elements in the groups that you arranged in step 2. Are you able to predict the properties of all of the groups? Explain.

c. Compare your periodic table (step 3) with that of your classmates. Which is best for accurately predicting the properties of the undiscovered elements?

Conclude and Communicate

d. Summarize the concepts about electron configurations of larger elements and the changes needed to accommodate 172 elements in the periodic table.

e. Experts cannot agree where the large elements beyond element 118 should go in the periodic table. What are the problems with arranging these elements?

f. INQUIRY Would a single periodic table with 172 elements be better for enabling chemists to make predictions about new elements? Explain.

g. RESEARCH HOW have Canadian scientists and/or scientists in Canadian laboratories advanced knowledge about the synthesis of new elements?

Reference no: EM132463716

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