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Electron Configurations

Total questions: 40

Worksheet time: 38mins

Name
Class
Date
1.

What atom matches this electron configuration?

1s22s22p63s23p64s23d10

a)

Zinc

b)

Copper

c)

Nickel

d)

Germanium

2.

What electron configuration matches an Bromine atom?

a)

1s22s22p63s2, 3p64s23d104p5

b)

1s22s22p4

c)

1s22s22p6

d)

1s22s22p63s23p64s23d1

3.

How many electrons can the first energy level hold?

a)

1

b)

2

c)

8

d)

0

4.
The electron configuration of an atom is 1s22s22p6.  The number of electrons in the atom is 
a)
3
b)
6
c)
8
d)
10
5.

Which electron configuration belongs to Chlorine (Cl)?

a)

1s2 2s2 2p6 3s2 3p5

b)

1s2 2s2 2p6 3s2 3p6

c)

1s2 2s2 2p6 3s2 3p7

d)

1s2 2s2 2p6 3s2 3p4

6.
This orbital diagram represents:  
a)
C
b)
B
c)
N
d)
O
7.
This orbital diagram represents:  
a)
C
b)
B
c)
N
d)
O
8.
What is incorrect about this orbital diagram?
a)
Both arrows in the 2p box should be pointing up
b)
There is nothing incorrect with this diagram
c)
In the there should only be 1 orbital in the first 2p box and one in the 2nd 2p box
d)
All the arrows should be pointing up.
9.
What is the noble gas shorthand electron for Sulfur atom?
a)
[Ar] 3p4
b)
[He] 3s23p4
c)
[Ne] 3s23p4
d)
[Na] 3s23p4
10.

How many electrons can be found in p orbitals in one energy level?

a)

2

b)

3

c)

4

d)

6

11.
What is the electronic configuration of iron?
a)
1s22s22p63s23p64s23d6
b)
1s22s22p63s23p63d8
c)
1s22p63s23p64s23d6
d)
1s22s22p63s23p64s13d6
12.

How many electrons are in the outer energy level of Sodium (Na)?

a)

3

b)

1

c)

2

d)

4

13.

What is this element?

[Ne] 3s23p64s2

a)

Calcium

b)

Sodium

c)

Scandium

d)

Titanium

14.
What is the noble gas configuration for beryllium?
a)
[He]1s2
b)
[He]2s2
c)
[Li]2s1
d)
[Li]2s2
15.
[Ne]3s23p1 is the noble gas configuration for which element?
a)
scandium
b)
boron
c)
nitrogen
d)
aluminum
16.

How many electrons does chlorine (Cl) have in its outer energy level?

a)

2

b)

5

c)

6

d)

7

17.
In an orbital diagram,  an arrow represents: 
a)
an electron
b)
an orbital
c)
an element
18.
How many unpaired electrons would lithium have?
a)
1
b)
2
c)
3
d)
0
19.
Which element would have 5 half-filled orbitals?
a)
sodium
b)
manganese
c)
sulfur
d)
uranium
20.
How many p electrons are in bromine?
a)
5
b)
12
c)
17
d)
6
21.
How many d electrons are in zirconium?
a)
2
b)
12
c)
40
d)
10
22.

Which of the following elements is a noble gas?

a)

1s2 2s2

b)

1s2 2s2 2p5

c)

1s2 2s2 2p6 3s2 3p6

d)

1s2 2s2 2p6 3s1

23.

What is the abbreviated electron configuration for silver?

a)

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d9

b)

[Kr] 5s2 4d9

c)

[Ar] 4s2 3d9

d)

[Ag]

24.

What is the abbreviated electron configuration for barium?

a)

[Xe] 6s2

b)

[Rn] 6s2

c)

[Ar] 4s2 3d10 4p5

d)

[He] 2s2 3p1

25.

Which of the following is the correct electron configuration for a phosphorus atom?

a)

1s2 2s2 2p6 3s2 3p3

b)

1s2 2s2 3p3

c)

1s2 2s2 2p6 3s2 3p6

d)

1s2 2s2 3s2 2p6 3p3

26.

What atom matches this electron configuration?

[Xe] 6s25d9

a)

Mercury

b)

Gold

c)

Platinum

d)

Thallium

27.
An orbital can at most hold how many electrons?
a)
1 electron
b)
2 electrons
c)
3 electrons
d)
4 electrons
28.
Which element is depicted from this orbital diagram
a)
Fluorine
b)
Neon
c)
Chlorine
d)
Argon
29.

How many electrons can fit in a p-orbital?

a)

1

b)

2

c)

6

d)

10

30.

Which electron configuration is correct

a)

1s22s22p63s23p64s23d6

b)

1s22s22p63s23p63d8

c)

1s22p63s23p64s23d4

d)

1s22s22p63s23p64s13d6

31.

Which electron configuration is correct

a)

[Kr] 4s23d6

b)

1s22s22p63s23p63d8

c)

1s22p63s23p64s23d4

d)

[Ar] 4s23d6

32.

How many unpaired electrons does an atom of oxygen (O) have?

a)

1

b)

2

c)

3

d)

4

33.
How many significant figures: 2016 m
a)
1
b)
2
c)
3
d)
4
34.
How many significant figures: 153.0 mL
a)
1
b)
2
c)
3
d)
4
35.
How many significant figures: 0.012 km
a)
1
b)
2
c)
3
d)
4
36.
How many significant figures: 100.000 cL
a)
1
b)
3
c)
5
d)
6
37.
How many sig figs are there?
100000000
a)
1
b)
9
c)
10
38.
How many sig figs are there?
0.000008
a)
1
b)
2
c)
6
d)
7
39.
How many sig figs are there?
9009.00
a)
2
b)
4
c)
5
d)
6
40.
How many significant figures does the following number have: 0.998005
a)
9
b)
10
c)
6
d)
5

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