Period: 2nd (l-shell)

The second period (l-shell) holds eight more electrons in the 2s and 2p subshells. Starting with lithium (3 electrons), the l-shell is completely filled up to neon (10 electrons).

3Li

Lithiumsilvery-white

4Be

Berylliumwhite-gray metallic

Boronblack-brown

Carbonblack, metallic-looking (graphite); clear (diamond)

Nitrogencolorless gas, liquid or solid

Oxygencolorless (gas); pale blue (liquid and solid)

Fluorinevery pale yellow (gas); bright yellow (liquid); alpha is opaque, beta is transparent (solid)

10Ne

Neoncolorless gas exhibiting an orange-red glow when placed in an electric field

H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og

Legend

1st (k-shell)2nd (l-shell)3rd (m-shell)4th (n-shell)5th (o-shell)6th (p-shell)7th (q-shell)