An atom with 1 proton, 1 neutron, and 8 electrons is an atom of oxygen. The atomic number of an element is determined by the number of protons in its nucleus, and in this case, there is 1 proton. Oxygen, with atomic number 8, has 8 protons. Neutrons do not affect the identity of the element but contribute to the atomic mass. In this case, there is 1 neutron.
To maintain electrical neutrality, the number of electrons in an atom is equal to the number of protons. Therefore, oxygen, with 8 protons, also has 8 electrons. The electron configuration of oxygen is 2-6, which means there are two electrons in the first energy level (closest to the nucleus) and six electrons in the second energy level.