which part(s) of the atom has/have a positive charge nucleus
There are two types of particle in the nucleus of an atom: the proton and the neutron. The proton has a positive charge and a large mass (1800 times more than an electron â see table 1). The number of protons in a nucleus is the same for all the atoms of a particular element. It corresponds to the atomic number of that element. For example, if a nucleus contains three protons, then it is part of an atom of lithium (atomic number 3). The neutron has a similar mass to the proton but has no charge.