The electrons of the atom move closer to the nucleus while the atom emits light.
dude..
Hhn
An alpha particle is a helium-4 nucleus. When it captures a pair of electrons, it becomes a helium-4 atom. Alpha particles released in nuclear decay events quickly pick up a pair of electrons from the environment and become those helium atoms, and the atom is said to be electrically neutral.
A radioactive atom is an atom that has an unstable nuclear force, and therefore either absorbs or emits a radioactive particle.
The number of protons decreases by 2.
Its nucleus emits radioactive particles continuously.
zinc
dude..
In a battery, or voltaic pile, the negative terminal or wire, called the anode, emits electrons in an electrical circuit. The other terminal, called the cathode, collects electrons in an electrical circuit.
Zinc
Electrodes
the gas is ionized, and free electrons, accelerated by the electrical field in the tube, collide with gas and metal atoms. Some electrons circling around the gas and metal atoms are excited by these collisions, bringing them to a higher energy state. When the electron falls back to its original state, it emits a photon, resulting in visible light or ultraviolet radiation.
hot filament
In a directly heated cathode, the filament is the cathode and emits the electrons. In an indirectly heated cathode, the filament or heater heats a separate metal cathode electrode which emits the electrons.
Solar cells convert the sun's energy and emits electrons. After this takes place photons bounce off silicons atoms forcing them in a orderly manner so create a electric current.
Hhn
A filament is needed in a Cathode Ray Oscilloscope (CRO) to emit electrons in the cathode-ray tube. The electrons are accelerated towards the screen to create the electron beam, which is then deflected to produce the display. The filament heats up and emits electrons through thermionic emission, contributing to the functioning of the CRO.