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Electron Configuration and Valence Electrons

Total questions: 15

Worksheet time: 15mins

Name
Class
Date
1.

How many valence electrons does Chlorine have?

a)

5

b)

2

c)

7

d)

5

2.

What atom matches this electron configuration?
1s22s22p63s23p64s23d10

a)

Zinc

b)

Copper

c)

Nickel

d)

Germanium

3.

What electron configuration matches an oxygen atom?

a)

1s22s22p63s2, 3p64s23d104p5

b)

1s22s22p4

c)

1s22s22p6

d)

1s22s22p63s23p64s23d1

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)

1s2s2p3s3p5

b)

1s2s2p3s3p6

c)

1s2s2p3s3p7

6.

Electrons occupy orbitals of lowest energy first is part of what electron configuration rule?

a)

Hund’s Rule

b)

Aufbau Principle

c)

Pauli Exclusion Principle

7.

What atom matches this electron configuration?
1s2s2p3s2

a)

Neon

b)

Magnesium

c)

Aluminum

d)

Potassium

8.

How many valence electrons are represented here?

a)

7

b)

5

c)

2

d)

8

9.

How many electrons can the d sublevel(orbital) hold?

a)

8

b)

10

c)

2

d)

4

10.

What is this element?

a)

Argon

b)

Krypton

c)

Selenium

d)

Bromide

11.

What is the electronic configuration of iron?

a)

1s22s22p63s23p64s23d6

b)

1s22s22p63s23p63d8

c)

1s22p63s23p64s23d6

d)

1s22s22p63s23p64s13d6

12.

What does Pauli exclusion principle state ?

a)

states that each electron occupies the lowest energy orbital available

b)

states that -no two electrons in the same orbital can have the same spin

c)

states that single electrons electrons with the same spin must occupy each-energy orbital before additional electrons with opposite spins can occupy the same orbitals

13.

What is the electron configuration of a sulfur atom?

a)

1s22s22p63s23p41s^2 2s^2 2p^6 3s^2 3p^4

b)

1s22s22p63s23p51s^2 2s^2 2p^6 3s^2 3p^5

c)

1s22s22p63s23p61s^2 2s^2 2p^6 3s^2 3p^6

d)

1s22s22p63s23p31s^2 2s^2 2p^6 3s^2 3p^3

14.

Which of the following elements has 5 valence electrons?

a)

Carbon

b)

Nitrogen

c)

Oxygen

d)

Fluorine

15.

How many valence electrons are present in a silicon atom?

a)

2

b)

4

c)

6

d)

8