Thank you very much! R The following three problems are about the following situ

Question

Thank you very much!

R

The following three problems are about the following situation: You will be given an element in its ground state energy level. Determine which (a-e) is a possible set of quantum numbers (n. 1 ml ms) for the outer electron. You may only select letter per question Helium (1, 0, 0, + 1/2) ( 1, 1, 0, + 1/2 ) (1, 0, 1, + 1/2) ( 1, 1, 0, - 1/2) (1, 0, 1, - 1/2) Oxygen (2, 0, 1, + 1/2) (2, 0, 1, - 1/2) (2,1,-1, + 1/2) (2, 0,-1, + 1/2) (2, 0, - 1, -1/2) Calcium (3, 1, 0, + 1/2) (3, 1, 1, + 1/2) (4, 2, 0, +1/2) (4, 2, 1, + 1/2) (4, 0, 0, + 1/2)

Explanation / Answer

n= main energy level (the row of the periodic table the element is in) l= angular momentum (0 to n-1) ml = magnetic quantum number (-L to L) ms = +/- 1/2 For helium, n = 1, so l has to be 0, because n-1 is 0. ml also has to be 0, and ms can be either(ms can always be either, pretty much don't worry about it) so 1, 0, 0, anything... which is a For oxygen n=2, l has to be 0 to 1, ml can be -1 to 1 The answer has to be c, because, it is the only one that has l=1, because when l=0, ml must equal zero. when l=1, ml can be -1, 0, or 1. For calcium, n = 4, l can be 0 to 3, but must be 0, because it only has electrons in the s orbital, so the answer has to be e.

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.