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Electron configurations

Total questions: 21

Worksheet time: 15mins

Name
Class
Date
1.
What atom matches this electron configuration?
1s22s22p63s23p64s23d10
a)
Zinc
b)
Copper
c)
Nickel
d)
Germanium
2.
The electron configuration of an atom is 1s22s22p6.  The number of electrons in the atom is 
a)
3
b)
6
c)
8
d)
10
3.

Choose the correct shortcut configuration for iodine.

a)

[Ar]4s24d104p5

b)

[Kr]5s24d105p5

c)

[Xe]5s25d105p5

d)

none of the above

4.

Which area on the periodic table represents the electrons in the "d" sublevel?

a)

representative elements

b)

columns 3-8

c)

rare earth elements

d)

transition elements

5.

Energy levels are denoted by:

a)

letters

b)

numbers

c)

a combination of letters and numbers

d)

subscripts

6.
How many electrons can the s sublevel hold?
a)
14
b)
10
c)
2
d)
6
7.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
8.
What is the total number of energy levels used by an atom of aluminum
(Al, atomic #13) in the ground state?
a)
3
b)
7
c)
13
d)
0
9.
According to the Aufbau Principle, which sublevel should starting filling with electrons after 5s?
a)
6s
b)
5p
c)
4d
d)
3f
10.
The second energy level (n=2) contains a total of 5 electrons...how many more electrons can fit in the 2nd energy level?
a)
0
b)
3
c)
5
d)
7
11.
Identify the element whose electron configurations ends with 5p3
a)
As
b)
Te
c)
Sb
d)
Sn
12.
Which of the following statements is true about the 3s and the 4s sublevels?
a)
These sublevels have the same energy
b)
These sublevels are the same distance from the nucleus
c)
These sublevels hold different amounts of electrons
d)
These sublevels have the same shape
13.
How many valence electrons are in an atom of sulfur?
a)
2
b)
4
c)
6
d)
8
14.
I am an element in the 3rd row of the periodic table...I have one unpaired electron in my last sublevel...I have 3 valence electrons...who am I?
a)
Na
b)
Al
c)
Cl
d)
Ar
15.

What would be the atomic number of the atom that would fill the 8s sublevel.....(hint: it comes after 7p!)

a)

118

b)

119

c)

120

d)

121

16.

What is the electron configuration of iron?

a)

1s22s22p63s23p64s23d6

b)

1s22s22p63s23p63d8

c)

1s22p63s23p64s23d6

d)

1s22s22p63s23p64s13d6

17.

The number of electrons that can occupy a 3d ORBITAL is....(really, ANY orbital)

a)

2

b)

1

c)

6

d)

10

18.

The highest energy sub level in Boron is...

a)

1s2

b)

2s2

c)

2p1

19.

The orbital/sublevel FARTHEST from the nucleus in Chromium is

a)

4s

b)

3d

c)

3p

d)

1s

20.

The orbital that fills AFTER 6s is

(a)  

21.

Check all of the following that could actually exist in a correctly written electron configuration.

a)

4s3

b)

3p4

c)

2p8

d)

6d3

e)

1s1

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