200000
Hydrogen - Atomic number: 1, Atomic mass: 1.008u Helium - Atomic number: 2, Atomic mass: 4.0026u Lithium - Atomic number: 3, Atomic mass: 6.94u Beryllium - Atomic number: 4, Atomic mass: 9.0122u Boron - Atomic number: 5, Atomic mass: 10.81u Carbon - Atomic number: 6, Atomic mass: 12.011u Nitrogen - Atomic number: 7, Atomic mass: 14.007u Oxygen - Atomic number: 8, Atomic mass: 15.999u Fluorine - Atomic number: 9, Atomic mass: 18.998u Neon - Atomic number: 10, Atomic mass: 20.180u