Answer:
It is Nitrogen (N).
Step-by-step explanation:
The atomic number of an atom is the number of protons in the nucleus, and the mass number is the total number of protons and neutrons in the nucleus.
In this case, the atomic number of 7 indicates that there are 7 protons in the nucleus, while the mass number of 8 indicates that there are 8 total particles in the nucleus (7 protons and 1 neutron).
Therefore, the element is Nitrogen (N), which has an atomic number of 7 and a mass number of 8.