Question

1. titanium (ti)

electron configuration: ____________
noble gas configuration: ____________

1. phosphorus (p)

electron configuration: ____________
noble gas configuration: ____________

1. sodium (na)

electron configuration: ____________
noble gas configuration: ____________

Explanation:

Step1: Recall electron - filling rules

Electrons fill orbitals in order of increasing energy (1s < 2s < 2p < 3s < 3p < 4s < 3d < 4p etc.), with a maximum of 2 electrons per orbital, 2 in s - orbitals, 6 in p - orbitals, 10 in d - orbitals. Noble - gas configuration uses the electron configuration of the nearest noble gas to simplify the notation.

Step2: Determine electron configuration of Titanium (Ti)

Titanium has atomic number 22. Filling electrons: 1s²2s²2p⁶3s²3p⁶4s²3d².

Step3: Determine noble - gas configuration of Titanium (Ti)

The nearest noble gas before Ti is Ar (atomic number 18). So the noble - gas configuration is [Ar]4s²3d².

Step4: Determine electron configuration of Phosphorus (P)

Phosphorus has atomic number 15. Filling electrons: 1s²2s²2p⁶3s²3p³.

Step5: Determine noble - gas configuration of Phosphorus (P)

The nearest noble gas before P is Ne (atomic number 10). So the noble - gas configuration is [Ne]3s²3p³.

Step6: Determine electron configuration of Sodium (Na)

Sodium has atomic number 11. Filling electrons: 1s²2s²2p⁶3s¹.

Step7: Determine noble - gas configuration of Sodium (Na)

The nearest noble gas before Na is Ne (atomic number 10). So the noble - gas configuration is [Ne]3s¹.

Answer:

1. Electron Configuration: 1s²2s²2p⁶3s²3p⁶4s²3d²

Noble Gas Configuration: [Ar]4s²3d²

1. Electron Configuration: 1s²2s²2p⁶3s²3p³

Noble Gas Configuration: [Ne]3s²3p³

1. Electron Configuration: 1s²2s²2p⁶3s¹

Noble Gas Configuration: [Ne]3s¹