Fission.
The center of an atom is called a nucleus (nucleifor plural).Center of an atom is called the "Nucleus".
The center of an atom is called the nucleus.
The smallest particle of an element is called an atom.
compounds
Simply "atom".
atom is called atom because atom can't be subdiviided into pieces
An atom is called an ion if there is a charge on it - positive or negative.
the positively charged part of an atom is called proton
A substance in which all the atoms are the same is called an "element".
The outer electrons of an atom are called valence electrons.
An ATOM!!!! An atom can be sub-divided in to protons, neutrons, and electrons.
they are the negative particles in an atom