It called cation, Well, When an atom gains or loses an electron, it
attains a net charge and becomes an ion. When electrons are lost, the
resulting ion is called cation and when electrons are gained, the
resulting ion is called an anion. So, Cations have a net positive
charge, while anions have a net negative charge. it is true.
Probably sodium Na because it has a similar atomic mass and number
I need more info this is not enough but I think it’s 2 of electron and 7 nitrogen which is acetic mass
