When the number of electrons is higher or lower than the number of protons.
it gets positive charge
One electron
An electron has a charge of -1. When a Sodium (Na) atom loses one electron, it loses a negative and becomes a stable Sodium ion with a charge of +1.
The charge of an atom as a whole is zero. We can give the charge of a nucleus. If any electron, negatively charged one, go out of atom then the atom gets positive charge and it is named as positive ion. Same way if excess electrons get cling with the neutral atom then the atom becomes a negative ion.
1+
because a proton has a positive charge and a neutron has a neutral charge so the proton's charge is the one that gets named
An atom with a charge is called an ion. If the atom gains electrons, it becomes a negative ion (anion), while if it loses electrons, it becomes a positive ion (cation).
what changes the charge of the atom
A neutral atom will have a charge of ZERO
Due to the difference in the electronegativities of the bonded atoms, the more electronegative atom attracts the shared pair of electrons towards itself, which increases the negative charge density around the attracting atom, consequently the other atom has less negative charge density and thus a positive charge density (relatively positive) gets generated at the donor atom.
the radius of an atom gets larger when moving left to right across the Periodic Table because elements gain protons and electrons- the increase in charge brings the atom radius in
An atom with an electrical charge is called an ion.