Chapter 2 - Inside The Atom Flashcards
(4 cards)
atoms of the same element that differ in the number of neutrons in the nucleus.
Isotope
describes a nucleus that does not change spontaneously. The protons and neutrons in the nucleus are held together strongly.
Stable
describes an atom in which the neutrons and protons in the nucleus are not held together strongly.
Unstable
a radioactive form of an isotope.
Radioisotope