The electron configuration you provided, 1s2 2s2 2p4, corresponds to the atomic number and name of the element oxygen (O).
The atomic number indicates the number of protons in an atom's nucleus, which also determines the element's identity. In this case, the atomic number of oxygen is 8.
The electron configuration notation represents the arrangement of electrons in different energy levels or shells. Breaking down the given configuration, "1s2" means that there are two electrons in the first energy level (the 1s sublevel). "2s2" indicates that there are two electrons in the second energy level (the 2s sublevel). Finally, "2p4" signifies that there are four electrons in the second energy level's p sublevel (specifically, the 2p sublevel).
Therefore, combining the atomic number and the electron configuration, we can determine that the element with the electron configuration 1s2 2s2 2p4 is oxygen (O) with an atomic number of 8.