The number of protons and electrons in the atom.
If the number of protons = number of electrons, it is electrically neutral.
If number of protons > number of electrons, it is positively charged.
If number of protons < number of electrons, it is negatively charged.
The valence electrons
overall charge
No. elements and all other mater will normally have no charge.
atomic mass
Proton
The number of protons.
The number of electrons determines an element's position.
The elements that compose it and the arrangement of its atoms
The family/group where they belong.
The proton.
Yes
the properties of elements are determined by the structures of their atoms.