Elements, Atoms, Ions, And The Periodic Table Worksheet With Answers Page 5
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1
2
3
4
5
6
7
8
9
10
11
12
13
14Energy Levels
n=1
n=2
n=3
n=4
number of sublevels
one
two
three
four
Sublevel Names
s
s and p
s, p and d
s. p, d and f
Sublevels and orbitals
1s (1)
2s(1) 2p(3)
3s(1) 3p(3) 3d(5)
4s(1) 4p(3) 4d(5) 4f(7)
Number orbitals
1
4
9
16
maximum number of
2
2
2
2
2(2n
)
2 + 6= 9(2n
)
2 + 6 + 10= 18 (2n
)
2 + 6 + 10 + 14 = 32 (2n
)
electrons per sublevel
2
The maximum number of electrons that can be in an energy level is 2n
, where n is equal
to the energy level being considered.
maximum number of
Energy
# of
sublevels
maximum number of electrons per
electrons
Level
Sublevels
names
sublevel
in an Energy Level
n = 1
2
1
s
2
n = 2
8
2
s, p
2, 6 =8
n = 3
18
3
s, p, d
2, 6, 10 =18
n = 4
32
4
s, p, d, f
2, 6, 10, 14 =32
Problem:
How many electrons are found:
Within principle shells? a) n = 1 b) n = 2 c) n = 3 d) n =4 e) n = 5
Answer:
2
2
a. n = 1; 2n
= 2(1)
= 2
2
2
b. n = 2; 2n
= 2(2)
= 8
2
2
c. n = 3; 2n
= 2(3)
= 18
2
2
d. n = 4; 2n
= 2(4)
= 32
2
2
e. n = 5; 2n
= 2(5)
= 50
Problem: With in a sub-shells: a) s, b) p c) d, d) f
Answer: a) s = 2, b) p=6 c) d=10, d) f= 14
Problem: With in a Orbital?
Answer: Two electrons.
Energy Levels and Sublevels
A sublevel is a part of a principal energy level and is designated s, p, d, and f. Each
sublevel may contain one or more orbitals, regions of space containing a maximum of two
electrons with their spins paired.
Schrodinger's work showed that
• Eeach orbital could have a maximum of two electrons.
Energy levels could contain different numbers of orbitals.
•
• Energy levels further from the nucleus can accommodate more orbitals than energy
levels nearer the nucleus.
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