Proton:4 Neutron:5 Spin:-3/2 Energy State: Stable Proton configuration: [He] 2s2
Proton:12 Neutron:12 Spin: 0 Energy State: Stable Proton configuration: [Ne] 3s2
Proton:20 Neutron:20 Spin:0 Energy State: Stable Proton configuration: [Ar] 4s2
Proton:38 Neutron:50 Spin:0 Energy State: Stable Proton configuration: [Kr] 5s2
Proton:56 Neutron:82 Spin:0 Energy State: Stable Proton configuration: [Xe] 6s2
Proton:88 Neutron:138 Spin:0 Proton configuration:[Rn] 7s2