a nucleus cant be a central atom. the nucleus is part of the atom. you are probably talking about why certain atoms are central atoms in a molecule and why some arent. the answer to that question is that the more electronegative atom will always appear as a central atom.
The nucleus is the central part of the atom. (It's in the center)
The central part of an atom is called the nucleus. Which contains electrons, protons and neutrons.
The central region of an atom is called the nucleus. The nucleus consists of many neutrons and protons which can form bonds.
The nucleus is the central part of the atom. (It's in the center)
The nucleus is the positively charged central mass of an atom.
The nucleus is the answer.
... is called the nucleus.
nucleus
The nucleus.
The Nucleus
The nucleus.
nucleus