Atomic structure signifies the structure of an atom encompassing a nucleus in which the protons are positively charged and neutrons that are neutral are present. The negatively charged particles are called electrons which spin around the center of the nucleus.
The addition of the total number of protons and neutrons existing in the nucleus of an atom is known as the mass number of an atom. it is represented by A.
Mass number = Number of protons + Number of neurons
The Atomic Structure Of Oxygen
The atomic number of oxygen = 8.
The number of electrons present in the outermost shell = 6.