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Electronic configuration

Total questions: 25

Worksheet time: 18mins

Name
Class
Date
1.
How many electrons can the first energy level hold?
a)
1
b)
2
c)
8
d)
0
2.

Chemists can identify the composition of some unknown salts by conducting a flame test. When potassium salts are heated in a flame, a purple color is observed.


This is due to the movement of electrons between energy levels. What is the electron configuration of a potassium atom at ground state?

a)

1s2; 2s2; 2p6; 3s2; 3p6; 4d1

b)

1s2; 2s2; 2p6; 3s2;3p6; 3d1

c)

1s2; 2s2; 2d6; 3s2; 3d6; 4s1

d)

1s2; 2s2; 2p6; 3s2; 3p6; 4s1

3.
The electron configuration of an atom is 1s22s22p6.  The number of electrons in the atom is 
a)
3
b)
6
c)
8
d)
10
4.
What atom matches this electron configuration?
1s22s22p63s23p64s23d10
a)
Zinc
b)
Copper
c)
Nickel
d)
Germanium
5.
What electron configuration matches an oxygen atom?
a)
1s22s22p63s2, 3p64s23d104p5
b)
1s22s22p4
c)
1s22s22p6
d)
1s22s22p63s23p64s23d1
6.
An orbital can at most hold how many electrons?
a)
1 electron
b)
2 electrons
c)
3 electrons
d)
4 electrons
7.
The electron configuration of an atom is 1s22s22p6.  The number of valence electrons in the atom is 
a)
3
b)
6
c)
8
d)
10
8.
What is the electron configuration for this atom?
a)
1s22s22p6
b)
1s22s22p5
c)
1s22s22p3
d)
2s22p3
9.

Which one of the following is the electronic configuration of the bromine atom?

a)

1s22s22p63s23p63d104s14p6

b)

1s22s22p63s23p63d104s24p7

c)

1s22s22p63s23p63d104s24p5

d)

1s22s22p63s23p63d104s24p6

10.

Which one of the following does not represent the electronic configuration of an atom in its ground state?

a)

1s2 2s2 2p3

b)

1s2 2s2 2p4

c)

1s2 2s2 2p6 3s1

d)

1s2 2s2 2p6 3d1

11.

Which one of the following is the electronic structure of a metal with a maximum oxidation state of +3?

a)

1s2 2s2 2p6 3s1

b)

1s2 2s2 2p6 3s2 3p4

c)

1s2 2s2 2p6 3s2 3p1

d)

1s2 2s2 2p6 3s2 3p6 3d10 4s2

12.

The vanadium atom (atomic number 23) in its ground state has the electronic configuration:

a)

1s2 2s2 2p6 3s2 3p6 3d3 4s2

b)

1s2 2s2 2p6 3s2 3p6 3d2 4s3

c)

1s2 2s2 2p6 3s2 3p6 3d1 4s2 4p2

d)

1s2 2s2 2p6 3s2 3p6 3d2 4s2 4p1

13.

Which element is pictured?

a)

neon (Z=10)

b)

fluorine (Z=9)

c)

magnesium (Z=12)

d)

argon (Z=18)

14.
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.
15.
Which orbital shows a violation of Hund's Rule?
a)
A
b)
B
c)
C
d)
D
16.

Which orbital shows a violation of the Aufbau Principle?

a)

A

b)

B

c)

C

d)

D

17.

Identify the correct sub shell electronic configuration of Chromium,Z=24

a)

1s22s22p63s23p63d44s21s^22s^22p^63s^23p^63d^44s^2

b)

1s22s22p63s23p63d54s11s^22s^22p^63s^23p^63d^54s^1

c)

1s22s22p63s23p63d61s^22s^22p^63s^23p^63d^6

d)

1s22s22p63s23p63d64s01s^22s^22p^63s^23p^63d^64s^0

18.

Choose the sub shell electronic configuration of Zinc ion,Zn2+

Z=30

a)

1s22s22p63s23p63d104s21s^22s^22p^63s^23p^63d^{10}4s^2

b)

1s22s22p63s23p63d101s^22s^22p^63s^23p^63d^{10}

c)

1s22s22p63s23p63d84s21s^22s^22p^63s^23p^63d^84s^2

d)

1s22s22p63s23p63d94s31s^22s^22p^63s^23p^63d^94s^3

19.

Identify the correct sub shell electrinic configuration of Manganese ion,Mn7+

Z=25

a)

1s22s22p63s23p63d54s21s^22s^22p^63s^23p^63d^54s^2

b)

1s22s22p63s23p63d51s^22s^22p^63s^23p^63d^5

c)

1s22s22p63s23p61s^22s^22p^63s^23p^6

d)

1s22s22p63s23p63d71s^22s^22p^63s^23p^63d^7

20.

Predict how the valence electrons in iron metal (iron 0) should be organized.

a)
b)
c)
d)
21.

Use your stability and filling rules to predict Cu0's valence shell. (4s and 3d subshells)

a)
b)
c)
d)
22.

Which of the following properties about transition elements is incorrect?

a)

Transition metals have variable oxidation state.

b)

They are the only elements that can form coloured ions in aqueous solution.

c)

Transition elements are good conductors

d)

They are the only elements that can form complexes.

23.

Why is zinc not considered a transition metal?

a)

Zinc is not a transition metal because it gains two 4s electrons to give a 2 with full d subshell levels.

b)

Zinc is not a transition metal because it loses four 4s electrons to give a 4 with full d subshell levels.

c)

Zinc is not a transition metal because it loses two 4s electrons to give a 2 with full d subshell levels.

d)

Zinc is not a transition metal because it gains two 4d electrons to give a 2 with full d subshell levels.

24.

electron configuration of Krypton

a)

1s22s22p63s23p64s23d104p6

b)

1s22s22p63s23p64s23d104p5

c)

1s22s22p63s23p64s23d94p6

d)

1s22s22p63s23p54s23d104p6

25.

What is the electron configuration of Cu2+?

a)

[Ar]3d94s2

b)

[Ar]3d104s1

c)

[Ar]3d9

d)

[Ar]3d10

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