DEPARTMENT OF CHEMISTRY AND CHEMICAL TECHNLOGY
C2710 INORGANIC CHEMISTRY I
ASSIGNMENT 1
30 November 2021
Due Date: 07 December 2021
Instructions:
1. Answer all three (3) questions
2. Answers must be computer generated using MS Word with Times New
Roman fonts and font size 12 and 1.15 or 1.5 line spacing, A4 page with
normal page margins
3. Answers may also be handwritten, but very legible and scanned. No screen
shots will be accepted. The scanned pages must be very clear with no
background colour.
4. Group work will attract a penalty.
5. Submit you answer script through Dropbox on Thuto, those who have no
access to Thuto can submit their answer scripts as an attachment by email
at eb.tanor@gmail.com
Question 1 [28 marks]
(a) Consider the element with atomic number, Z = 32
(i) Write the detailed electronic configuration
(ii) State the period to which the element belongs in the periodic Table
(iii) State the group to which the element belongs in the Periodic Table
(iv) What is the possible highest oxidation state of the element?
[1]
[1]
[1]
[1]
(b) (i) State the 4 quantum numbers required to describe an electron in an atom.[4]
(ii) What information does each quantum number give about the electron?
[4]
(c) Complete the table below by given the values for n, l, ml, and ms
[16]
Quantum numbers
Species
The outermost
The outermost
The outermost
The outermost
n
electron
electron
electron
electron
in
in
in
in
l
ml
ms
Cs
Cu
Ti+
Sc2+
Question 2 [12 marks]
(a) In terms of the valence electronic configuration all the elements of the Periodic
Table are divided into four groups; s-block, p-block. d-block and f-block
Write the general valence electronic configuration for each group.
[4]
Page 1 of 2
(b) In a test, students were asked to write the electronic configuration for an atom
of the element with atomic number, Z = 42 in the stationary state. Below are
some of the answers given: (b1). [Kr]4d45s2 (b2). [Kr] 5s24p4; (b3). [Kr]4d55s1
(i) Which of these answers is correct?
[1]
(ii) Explain why the other two answers are wrong.
[4]
(iii) What is the period number of the element in the Periodic Table?
[1]
(iv) What is the group number of the element in the Periodic Table?
[1]
(v) What is the possible highest positive oxidation state the element can form? [1]
Question 3 {[20 marks]
(a) Write the detailed electronic configuration of an atom of the element with
atomic number 25. Answer the following questions about this element using the
electronic configuration you have written.
(i)
The period of the Periodic Table to which the element belongs.
[1]
(ii)
The group of the Periodic Table to which the element belongs.
[1]
(iii) The highest possible stable positive oxidation state of the element.
[1]
(iv)
Identify the element and write the formula for the highest possible stable
oxide.
[2]
(b) Write the electronic configuration for an atom in the ground state of the element
with atomic number 32.
[2]
Using the electronic configuration you have written, answer the following
questions about the element.
(i) The period which the element belongs to in the Periodic Table.
[1]
(ii) The group which the element belongs to in the Periodic Table.
[1]
(iii) State all the possible oxidation states of the element.
[4]
(iv) Which of these oxidation states is stable?
[3]
(v) The highest possible oxidation state of the element.
[1]
(v) The formula for the highest oxidation state in aqueous solution.
[1]
(vi) The formula for the highest oxidation state in an alkaline solution.
[2]
Page 2 of 2