Determine the Electron Configuration, Orbital Notation, and Four Quantum Number of the ff:

Question

1. ₉F

2. ₂₀Ca

3. ₂₅Mn

Answer 1

Regarding the four quantum numbers, the following are the quantum number ONLY for the LAST valence electron. Not sure if that's what is being asked for, but that's typically what they want. Unfortunately, the orbital notation did NOT format properly and so the 1s 2s etc. do not appear exactly under the correct set of arrows. Sorry, not my fault.

1). F-9: 1s2 2s2 2p5

↑↓ ↑↓ ↑↓ ↑↓ ↑

1s 2s 2p

n = 2; l = 1; ml = 1; s = +1/2

2). Ca-20: 1s2 2s2 2p6 3s2 3p6 4s2

↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓

1s 2s 2p 3s 3p 4s

n = 4; l = 0; ml = 0; s = -1/2

3). Mn-25: 1s2 2s2 2p6 3s2 3p6 4s2 3d5

↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↑↑↑↑ ↑↓

1s 2s 2p 3s 3p 3d 4s

n = 4; l = 0; ml = 0; s = -1/2