Question 2

Electron Configuration

I. Write the electron configuration for each of the following elements (these are not real

elements, but their atomic number is indicated for you to work out the electronic structure).

Please use the configuration based on the correct energy levels.

a.

b.

9Tt

21Nm

48ZZ

CHEM40079 Term 2 2023

Student Number

Assessment 2

Name

(10 marks)

(6 marks)

Page 2 of 13

II. A student, who identified the electron configuration for Rf (fictitious) as 15² 25² 2p 3s² 3pº 3d¹° 4s²4pº 4d¹,

was marked as incorrect. Write the correct electron configuration for Rf (2 mark) and demonstrate why,

based on your knowledge of electronic energy levels, the configuration given by the student cannot be

correct. (2 marks)