Textbook 1D#13

[haley f]

) How many values of the quantum number l are possible when n=7? (b) How many values of ml are allowed for an electron in a 6d-subshell? (c) How many values of ml are allowed for an electron in a 3p-subshell? (d) How many subshells are there in the shell with n=4?

I am confused on part b. I know l is 0-5, but I don't know how to get ml from that. Also, how do you now how many subshells would be in the shell with n=4? Would it be 4 for s, p, d, and f?

[Natalie Do 3F]

If n is 6, the biggest d can be is 5. Ml isn't milliters but instead is a combination of m and l atomic numbers I believe?

For n=4 you were right about it being 4s, 4p, 4d, and 4f :)

[Praneetha Kakarla 3A]

The number of values for ml corresponds to the number of orbitals within the subshell. A d orbital can hold 10 electrons in 5 orbitals, so the number of values of ml is 5. Going from l to ml, the values for ml are from -l to l. As you said, the number of values for l is from 0-5. Since we are dealing w/ a d orbital, the value of l is specifically 2 in this case, so the values for ml are -2, -1, 0, 1, and 2.

For your question on the number of subshells, the number of subshells is the number of values of l which is just 0 to n-1.