Atomic Number: 109

Name: Meitnerium

Atomic symbol: Mt

Atomic Weight: 279

Electron configuration: 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰5s²5p⁶4f¹⁴5d¹⁰5f¹⁴6s²6p⁶6d⁷7s²