strong
The force responsible for holding the nucleus of an atom together is called the strong nuclear force. It overcomes the electrostatic repulsion between positively charged protons in the nucleus, keeping the protons and neutrons bound together.
The particle responsible for holding the nucleus together is the strong nuclear force mediated by particles called gluons. This force overcomes the electrostatic repulsion between positively charged protons within the nucleus, keeping it stable.
radioactive decay
A nucleus that starts to decay is called a radioactive nucleus or atom. It decays with a known and unique half life by several processes including but not limited to beta decay, alpha decay, electron capture decay, and positron emission.
It isn't really an ELEMENT that is unstable, but an ISOTOPE. That means that in general, for the same element, some atoms will decay, and some will not - the difference being the number of neutrons in the nucleus.
radioactive decay
A gamma wave...
The cloud around an atom's nucleus is called an electron cloud. An electromagnetic force binds electrons inside an electrostatic potential well, which surrounds the nucleus.
Yes,The element is radioactive due to the instability of its nucleus.See the related question below for more information.
Nucleus that causes a neutron to change into a proton is called a beta particle.
Any radioactive element gives off subatomic particles, and these particles carry considerable energy. That is the definition of radioactivity. Examples of radioactive elements include uranium, plutonium, polonium, radium, and many more.
An atom whose nucleus decays over time is called radioactive. Some examples of radioactive substances are uranium, plutonium, and einsteinium.