Nobelium

Actinoid

Unusually stable +2 (5f¹⁴).

Electronic Configuration

[Rn] 5f¹⁴ 7s²or1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 5f¹⁴ 7s²

Electron shells

2e⁻

n=1

8e⁻

n=2

18e⁻

n=3

32e⁻

n=4

32e⁻

n=5

8e⁻

n=6

2e⁻

n=7

Properties

Atomic number

102

Atomic mass

259 u

Nobelium

Actinoid

Unusually stable +2 (5f¹⁴).

Electronic Configuration

[Rn] 5f¹⁴ 7s²or1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 5f¹⁴ 7s²

Electron shells

2e⁻

n=1

8e⁻

n=2

18e⁻

n=3

32e⁻

n=4

32e⁻

n=5

8e⁻

n=6

2e⁻

n=7

Properties

Atomic number

102

Atomic mass

259 u