isotope
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All isotopes of an element have the same number of protons, otherwise they would not be the same element. What varies is the number of neutrons, they can be more or less than in the stable isotope(s) of the element.
Isotopes of an element have the same number of protons but different numbers of neutrons. This leads to variances in atomic mass among isotopes of the same element.
Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons. Isomers are molecules with the same chemical formula but different arrangements of atoms. Ions are atoms or molecules that have gained or lost electrons, resulting in a net positive or negative charge.
When an alpha particle is emitted, the nucleus of the original element loses two protons and two neutrons, transforming into a new element. This process is a type of radioactive decay that helps the nucleus become more stable.
An ion is an element that has lost or gained electrons, "cation - positive charge", "anion - negative charge". Gaining a charge causes the element to be more or less reactive. An isotope is an element that has lost or gained neutrons. Losing or gaining neutrons does not effect the overall charge, but it does affect the elements stability.