Question

Question:Which atom has the electron configuration 1s²2s²2p⁶3s²3p⁶3d⁷4s²?

Short answer

The atom is cobalt (Co).

Step-by-step solution

analyzing the given data

Given electron configuration = 1s²2s²2p⁶3s²3p⁶3d⁷4s²

To find; the atom with the given configuration

determining the atom which has the given electron configuration

Observing the periodic table, to identify an atom with the electron configuration 1s²2s²2p⁶3s²3p⁶3d⁷4s², we need to focus on 3d⁷4s², this leads us to atomic number 27, which is Co (Cobalt) in the periodic table.