radioactive decay
the number of protons and neutrons
An unstable ratio of protons and neutrons.
Protons, electrons, and neutrons are the subatomic particles that are involved in nuclear reactions.
Protons have a positive charge, neutrons are neutral, and electrons have a negative charge.
Neutrons can be removed or added to change the atomic mass of an atom; a atom with the same amount of protons but different amounts of neutrons are called isotopes.(Taking or removing protons would change the type of atom and electrons do not have sufficient mass to change the atomic mass.)
the number of protons and neutrons
No, it is a chemical change. ---------------------------------- Yes, it is a physical change because this change not involve a chemical reaction but a nuclear reaction followed by a change in the number of protons and neutrons.
Only those involved in nuclear reactions. Ordinary chemical reaction can not effect this change.
They change into neutrons. The reaction is that two protons become one neutron plus one proton, together with one positron and one neutrino. The full sequence in which four protons become one helium nucleus (two protons plus two neutrons) is well illustrated in the link given below., from Wikipedia.
An unstable ratio of protons and neutrons.
Protons, electrons, and neutrons are the subatomic particles that are involved in nuclear reactions.
The number of protons and neutrons does not change when an ion forms.
The only way to change the number of protons in an atom is with a nuclear reaction.
In a regular sample of the element of gold, meaning no change done to it, then there will be 79 protons and 118 neutrons
Protons have a positive charge, neutrons are neutral, and electrons have a negative charge.
Protons make up the identity of the element and give it its unique properties. Protons have a positive charge. Neutrons give an atom additional mass, and the number of neutrons in an atom make it an isotope of an element. Neutrons have no charge.
The number protons in an atom is called the atomic number (it is this number that tells us which element the atom is). The number of neutrons in an atom can change, but the term for the amount of neutrons is called an isotope. The number of protons and neutrons added together is called the atomic mass.