Chem 201 – Spring 2022
Deadline: 13.03.2023
Homework 1
1)
a)
b)
c)
d)
e)
f)
g)
h)
i)
What is the expected ground-state electron configuration of the following elements? (2 pts)
Selenium:
Osmium:
Tin:
Iodine:
Ru2+
Co3+
Zn2+
Cl–
Te2–
2) What is the maximum number of electrons that can be described for the given information of shell,
subshells, orbital and electron spin? (2 pts)
1
1
a) 𝑛 = 4, 𝑙 = 2, 𝑚𝑙 = 0 and 𝑚𝑠 = 2 𝑜𝑟 − 2 ?
b) 𝑛 = 3, 𝑚𝑙 = 1, 𝑚𝑠 = 1/2 ?
c) 𝑛 = 4 ?
d) 𝑛 = 4, 𝑙 = 2 ?
1
e) 𝑛 = 4, 𝑙 = 2, and 𝑚𝑠 = − 2 ?
3)
In a different galaxy, called Anarres, the electrons are governed by four quantum numbers as;
𝑛 (principal quantum number) = 1, 2, 3 ...
𝑙 (angular momentum quantum number) = 0, 1, 2, 3 ... 𝑛 (orbitals are referred as s, p, d, f like our universe)
𝑚𝑙 (magnetic quantum number) = -𝑙, -𝑙+1, …, 0
𝑚𝑠 (spin quantum number) = +1/2, 0, -1/2.
(Hint: You have to construct the periodic table for Anarres according to new quantum numbers, and orbitals
do not overlap.) Show your work clearly on each question. Correct answers without an explanation will not be
credited.
a)
What is the atomic number of the third lightest noble gas in the periodic table of the galaxy Anarres? (1
pts)
b) The element Isium (I) is a second-row element. It reacts with element Q (the lightest element in the
periodic table) to form Q2I, that is quite toxic and appears in the gas phase at room temperature. What is
the atomic number of the element I? (1 pts)
c) Element “K” has an atomic number of 53. What is the formula of the compound when K reacts with
element I? Explain the bond type between I and K. (2 pts)
d) Draw the electronic configuration for the following elements, and indicate if they are metals, non-metals
or noble gases. (Note that in the universe Anarres the same notation is used for atomic numbers)? (2 pts)
i)
ii)
iii)
iv)
24𝑆:
11𝑇 :
102𝑇 𝑢
:
55𝑀:
HIO - BB