It would depend on the isotope.
The lithium ion is essentially the same as the lithium atom, except it has lost 1 electrons. The number of protons and neutrons remain the same. Thus, the lithium ion, Li+ has 3 neutrons, just like the lithium atom.
ion
Ion
A heavy ion is the nucleus of a heavy atom. Heavy atoms are those of elements with atomic weights around that of cobalt or greater.
29, it's the same as the atomic number, unless it's an isotope or an ion
An Mg2+ ion is a magnesium ion that has a charge of +2, meaning it has lost 2 electrons. The number of neutrons in an Mg2+ ion is the same as in a regular magnesium atom, which is 12 neutrons.
If the number of protons and neutrons are the same, its an atom, if not its an ion
The oxidation number of a Cobalt (III) ion is +3. This means that the Cobalt atom has lost three electrons.
This is not an atom. This is an ion. This is Na+ ion.
The lithium ion is essentially the same as the lithium atom, except it has lost 1 electrons. The number of protons and neutrons remain the same. Thus, the lithium ion, Li+ has 3 neutrons, just like the lithium atom.
ion
N-14 is the most common isotope of nitrogen atom and it has 7 protons, 7 neutrons
A negative oxygen ion still has 8 neutrons, just like a neutral oxygen atom. The number of neutrons in an atom is determined by the element's atomic number, which for oxygen is 8. Changing the number of protons would change the element itself, not the charge of the ion.
+ or - 4
Ion
The neutral atom of cobalt has 27 electrons. The number can vary up or down depending on the chemistry of the sample of cobalt. A link is provided to the Wikipedia article on the element cobalt.
This atom of Nitrogen with 7 protons, 7 neutrons, and 8 electrons is an isotope, specifically nitrogen-14. It is not an ion because it has an equal number of protons and electrons, so its charge is neutral. It is also not an average atom, as it has a specific number of protons and neutrons that define it as a particular isotope.