Helium is a neutral atom that has several isotopes and can become an ion.
An alumimium atom is electrically neutral and it is an isotope of aluminum.
Helium atom is neutral and has no charge. It becomes a positive ion with a charge of +1 when it loses an electron.
When a helium atom loses an electron, it forms a helium ion which is positively charged because it has one less electron than protons. This helium ion is written as He+.
This is not an atom. This is an ion. This is Na+ ion.
The atom is an isotope of helium called helium-4. It contains 2 protons and 2 neutrons in its nucleus, giving it a total atomic mass of 4 atomic mass units.
ion
Neutral atom. An atom of nitrogen will also be an isotope of nitrogen.
It's either a heavy isotope of helium or a positive lithium ion.
A chromium ion is not neutral. By definition an ion is not neutral. All atoms belong to an isotope, but that has nothing to do with whether the atom is ionized or not.
they all have the same element with the same number
You call it an ion of that isotope. Let's use carbon-14 for example. If a carbon-14 atom gains/loses an electron, you simply call it a "carbon-14 ion".
In one atom of cobalt ion, the number of neutrons can vary based on the isotope. The most common isotope of cobalt is cobalt-59, which has 33 neutrons.