There are 53 protons and 53 electrons in an iodine atom.
Without knowing which nuclide is in question, it remains safe to say that regardless of the element, in an ion the atomic number or count of protons differs from the number of electrons - and thus the atom is overall not electrically neutral - the definition of an ion. With fewer electrons than protons, it would be a positively charged ion (cation); with more electrons than protons, it would be a negative ion (anion). If the atomic number (proton number) is P, the charge is x and the mass number is M, then protons = P neutrons = M- P and electrons is the algebraic sum of P and x.
Proton: positive charged Electron: negative charged Neutron: neutral
Every atom has a certain number of protons, neutrons, and electrons. Different elements have different amounts of these. Particularly, different elements have different numbers of protons. For example, if an atom only has 1 proton it must be hydrogen.
An atom can either have a positive or negative charge, and a charged atom is called an ion. If an atom loses an electron to another atom, it becomes a positive ion. If an atom gains an electron, it becomes a negative ion.
An electron or electrons is/are lost or gained to produce an ion. An atom with the same number of electrons as protons is a neutral atom. If the proton count and electron count do not match, that atom is electrically "imbalanced" and is an ion.
Iodide ion or I- ion
As an iodine atom has 53 electrons, an iodide ion has 54 electrons.
47 protons and 46 electrons.
The atomic number of iodine, or I, is 53. Thus, neutral iodine would have 53 protons and 53 electrons. However, since we're talking about I-, we need to add an additional electron to this number, making it 54. Finally, the specific isotope of iodine in question, 131I, has 131 - 53 = 78 neutrons.
35 protons, 36 electrons
An oxide ion has 8 protons. This is because it is an oxygen atom that has gained 2 electrons to become negatively charged. The number of protons remains the same as the number of protons in a neutral oxygen atom.
There are many different types of ions, having many different quantities of electrons and protons. The H+ ion has one proton and no electrons. That's the simplest.
chlorine ion has 17 protons and 18 electrons.
A neutral atom has an equal number of protons and electrons. Protons are positively charged, and electrons are negatively charged. Therefore if you have an ion with a -1 charge, it has one extra electron. So your ion has 85 protons.
Beryllium (Be) has 4 protons and 4 electrons in its neutral state. When it forms the Be2+ ion, it loses two electrons, leaving it with 4 protons and 2 electrons. The Be2+ ion has a 2+ charge because it has lost two negatively charged electrons.
If you are not an ion then you will have 17.
20