10 - Neon noble gas
Discovered by Morris Travers in 1898
Neon is a chemical element with symbol Ne and atomic number 10. It is in group 18 (noble gases) of the periodic table. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air.
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 | 8 | 2 in 2s + 6 in 2p |
colorless gas exhibiting an orange-red glow when placed in a high voltage electric field Appearance
20.2 u Atomic Mass
27.1 K Boiling Point
18 Group
0.58 Å Covalent Radius
0.0009 g/cm³ Density
−116 kJ/mol Electron Affinity
1s2 2s2 2p6 Electron Configuration
[He] 2s2 2p6 Electron Configuration (semantic)
10 Electrons
21.6 eV First Ionization Energy
2080.7, 3952.3, 6122, 9371, 12177, 15238, 19999, 23069.5, 115379.5, 131432 kJ/mol Ionization Energies
24.7 K Melting Point
2 Mendeleev Number
2 Number of Shells
8 Electron Valency
10 Neutrons
10 Atomic Number
8 Number of Isotopes
2 Period
Gas Phase
10 Protons
2, 8 Electron Shell Occupations
1.03 J/(g K) Specific Heat