Quantum Numbers

1.What is the electronic configuration of Lithium? (Lithium has 3 electrons)

• 1s1 2s2  

• 1s3

• 1s1 2s1 2p1

• 1s2 2s1

3. Any s-subshell can hold up to maximum of how many electrons?

• 10  

• 14  

• 2

• 6

4. How many orbitals are there in a d-subshell?

• 1

• 3

• 5

• 7

5. The second quantum number is the ___________ that describe the shape of the orbitals.

• Principal quantum number

• Angular momentum quantum number

• Magnetic quantum number 

• Spin quantum number

2. Boron has 5 electrons. Which of the following is Boron’s electronic configuration?

• 1s5  

• 1s2 2s2 2p1  

• 1s2 2s1

• 1s1 2s2 2p2