3 - Lithium alkali metal
Discovered by Johan August Arfwedson in 1817
Lithium (from Greek:λίθος lithos, "stone") is a chemical element with the symbol Li and atomic number 3. It is a soft, silver-white metal belonging to the alkali metal group of chemical elements. Under standard conditions it is the lightest metal and the least dense solid element.
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
57-71 La-Lu Lanthanides
89-103 Ac-Lr Actinides
| Shell | Electrons | Orbitals |
|---|---|---|
| 1 | 2 | 2 in 1s |
| 2 | 1 | 1 in 2s |
6.94 u Atomic Mass
2.1 Å Atomic Radius
1.62k K Boiling Point
1.28 Å Covalent Radius
0.534 g/cm³ Density
59.6 Electron Affinity
0.98 Electronegativity
5.39 eV First Ionization Energy
454 K Melting Point
2 Number of Shells
1 Electron Valency
3 Atomic Number
2, 1 Electron Shell Occupations
3.58 J/(g K) Specific Heat