Electron Configuration for Periodic Elements

Hydrogen (H)

1s^1

Helium (He)

1s^2

Lithium (Li)

[He] 2s^1

Beryllium (Be)

[He] 2^s2

Boron (B)

[He] 2s^2 2p^1

Carbon (C)

[He] 2s^2 2p^2

Nitrogen (N)

[He] 2s^2 2p^3

Oxygen (O)

[He] 2s^2 2p^4

Fluorine (F)

[He] 2s^2 2p^5

Neon (Ne)

[He] 2s^2 2p^6

Sodium (Na)

[Ne] 3s^1

Magnesium (Mg)

[Ne] 3s^2

Aluminum (Al)

[Ne] 3s^2 3p^1

Silicon (Si)

[Ne] 3s^2 3p^2

Phosphorus (P)

[Ne] 3s^2 3p^3

Sulfur (S)

[Ne] 3s^2 3p^4

Chlorine (Cl)

[Ne] 3s^2 3p^5

Argon (Ar)

[Ne] 3s^2 3p^6

Potassium (K)

[Ar] 4s^1

Calcium (Ca)

[Ar] 4s^2

Scandium (Sc)

[Ar] 3d^1 4s^2

Titanium (Ti)

[Ar] 3d^2 4s^2

Vanadium (V)

[Ar] 3d^3 4s^2

Chromium (Cr)*

[Ar] 3d^5 4s^1

Manganese (Mn)

[Ar] 3d^5 4s^2

Iron (Fe)

[Ar] 3d^6 4s^2

Cobalt (Co)

[Ar] 3d^7 4s^2

Nickel (Ni)

[Ar] 3d^9 4s^2

Copper (Cu)*

[Ar] 3d^10 4s^1

Zinc (Zn)

[Ar] 3d^10 4s^2

Gallium (Ga)

[Ar] 3d^10 4s^2 4p^1

Germanium (Ge)

[Ar] 3d^10 4s^2 4p^2

Arsenic (As)

[Ar] 3d^10 4s^2 4p^3

Selenium (Se)

[Ar] 3d^10 4s^2 4p^4

Bromine (Br)

[Ar] 3d^10 4s^2 4p^5

Krypton (Kr)

[Ar] 3d^10 4s^2 4p^6

S subshell

Spherical

one type

P subshell

Principal

3 types

x y z

D subshell

Diffuse

5 types

d_xy, d_xz, d_yz, d_x^2-y^2, d_z^2

F subshell

Fundamental

7 types

fz³, fz(x²-y²), fx(x²-3y²), fy(3x²-y²), fxyz, fxz², and fyz².