Question

Question:which atom has the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d²?

Short answer

The atom is zirconium (Zr).

Step-by-step solution

analyzing the given data

Given electron configuration = 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d²

To find; the atom with the given configuration

determining the atom which has the given electron configuration

Observing the periodic table, to identify atom with the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d²we need to focus on 5s²4d², this leads us to atomic number 40, which is Zr (zirconium) in the periodic table.