Final answer:
The atom with the electron configuration 1s²2s²2p⁶6s²3p⁶4s²3d⁷ is iron (Fe), which has a total of 26 electrons matching its atomic number.
Step-by-step explanation:
The atom with the electron configuration 1s²2s²2p⁶6s²3p⁶4s²3d⁷ is iron (Fe). The electron configuration represents the distribution of electrons among the orbitals of an atom. In this notation, the numbers represent the energy levels or shells, the letters (s, p, d, f) represent the types of subshells, and the superscripts represent the number of electrons in those subshells.
To determine which element has a given electron configuration, one simply adds up the total number of electrons reflected in the configuration and matches it to the corresponding atomic number on the periodic table. The configuration given has a total of 26 electrons, which corresponds to the atomic number of iron (Fe), making it the correct answer.