Answer:
15P) 3s² 3p³
19K) 4s¹
28Ni) 3d⁸ 4s²
35Br) 3d¹⁰ 4s² 4p⁵
58Ce) 4f¹ 5d¹ 6s²
Explanation:
1) 15P
Phosphorus has 15 electrons
The order of filling of the energy levels is 1s, 2s, 2p, 3s, 3p, 4s, . . .
The 15 electrons of the phosphorus atom will fill up to the 3p orbital, which will contain three electrons
The electron configuration for 15P is: 1s2 2s2 2p6 3s2 3p3
3s² 3p³
2) 19K
Potassium has 19 electrons
The electron configuration for 19K is: 1s2 2s2 2p6 3s2 3p6 4s1
4s¹
3) 28Ni
Nickel has 28 electrons
The electron configuration for 28Ni is: 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 2 3 d 8
3d⁸ 4s²
4) 35Br
Bromine has 35 electrons
The electron configuration for 35Br is: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p5
3d¹⁰ 4s² 4p⁵
5) 58Ce
Cerium has 58 electrons
The electron configuration for 58Ce is: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f1 5d1
4f¹ 5d¹ 6s²
