It is the neutron that makes changes in atomic nuclei to change them from one isotope to another. For any given element, that element will have a fixed number of protons. It is, after all, the number of protons that determine the elemental identity. But the number of neutrons in a given element can vary, and we use the term isotope to talk about which particular atom we're investigating. That is, we apply the term isotope to speak to an atom of a given element with a certain number of neutrons in its nucleus.
The number of neutrons is different for each isotope.
protons
When an atom of an element has a different number of neutrons.
No, never. An isotope has to do with the nucleus of the atom.
an isotope of an element
Neutron
isotope effect occurs when there is a difference in the rate of reaction when an atom is replaced by an isotope.
When an atom of an element has a different number of neutrons.
It is an isotope of a neutral atom.
Yes, they usually are; being an isotope does not change the chemistry of the atom.
No, never. An isotope has to do with the nucleus of the atom.
An alumimium atom is electrically neutral and it is an isotope of aluminum.
an isotope of an element
An isotope shares the atomic number with its element atom. How does it differ from the element atom?
Neutron
isotope effect occurs when there is a difference in the rate of reaction when an atom is replaced by an isotope.
An element is a class of substances An atom is the smallest possible piece of an element. An isotope is an electrically charged atom.
isotope
An isotope will have the same number of protons, but a different number of neutrons than a given atom.