Download Quantum Model of the Atom

SCH 4U
Quantum Model of the Atom
Assignment
Due Thursday October 25th
1. Calculate the maximum number of electrons with principal quantum number of 4. (1)
2. What is the maximum number of electrons that may be designated as 3s? 3d? 4d? 4f? (2)
3. Identify the group containing atoms whose highest energy electron (3)
a) enters and fills an s orbital
b) enters but does not fill an s orbital
c) is the first to enter a p sublevel
d) enters and fills a given p sublevel
e) is the first to enter a d sublevel
f) half fills a d sublevel
4. Explain why we fill the 4s orbital before we fill the 3d orbital. (2)
5. Write a set of 4 permissible quantum numbers for the electron found in the outermost energy
level of a potassium atom. (1)
6. For each of the following give the sublevel designation (s,p,d or f), the allowable ml values, and
the number of orbitals. (2)
a)
n = 2, l =0
b)
n = 3, l = 2 c)
n = 5, l = 1
d)
n = 4, l = 2
7. Are the following quantum number combinations allowed? If not, suggest two ways to correct
them. (5)
a)
n = 2; l = 0; ml = -1 b)
n = 4; l = 3; ml =-1 c)
n = 3; l = 1; ml = 0
d)
n = 5; l = 2; ml = +3 e)
n = 3; l = 2; ml = -2
SCH 4U
8. How many families of elements are in the s block? How many families of elements are in the p
block? How many families of elements are in the d block? How many families of elements are
in the f block? Comment on the significance of these numbers. (3)
9. Explain the reactivity of the alkali metals using your new knowledge of quantum numbers and
electron configuration. (2)