Question

What is the second quantum number of a 2s^2 electron in phosphorus,
1s^2 2s^2 2p6 3s^2 3p^3?
A. 1 = 0
B. 1-3
C. 1-2
D. 1= 1

Answer 1

Answer:

l = 0

Explanation:

Second quantum number, also known as angular momentum quantum number (l), represents the shape of an orbital. Several quantum numbers and their corresponding orbital shapes are worth remembering:

• l = 0, this is an s-shaped orbital;
• l = 1, this is a p-shaped orbital;
• l = 2, this is a d-shaped orbital;
• l = 3, this is a f-shaped orbital

Notice that the angular momentum quantum number might be identified solely from the letter. Since we're considering a $2s$ orbital, this means we're dealing with an s orbital. As defined above, s-shaped orbital would have an l value of l = 0.

Answer 2

Answer: l = 0 is the answer:)