Nihonium
Atomic number 113 means that every Nihonium nucleus contains 113 protons. That proton count is the element's identity: change it and you no longer have Nihonium.
Start with the nucleus
Atomic number 113 means that every Nihonium nucleus contains 113 protons. That proton count is the element's identity: change it and you no longer have Nihonium.
Nihonium (Nh) is chemical element 113. It belongs to the post-transition metals, and its reference state at room temperature is not firmly established. Those basic facts are a useful starting point for its chemistry and applications.
In practice, it turns up most often in scientific research.
See the atom
Conceptual visual: electron shells are a learning aid, not a literal picture of quantum orbitals.
What this number means
Atomic number 113 means that every Nihonium nucleus contains 113 protons. That proton count is the element's identity: change it and you no longer have Nihonium.