Classical they will emit electromagnetic waves (light and radio waves).
Quantum effects might limit this since if the electrons are in the ground state (or all lower states are occupied) they can not emit any photons (quanta of electromagnetic waves).
Vibrating electrons emit LIGHT.
If there are excess electrons in an atom, the atom is likely to be ionized; that is, the stom will emit the electrons.
Atoms emit energy as light when electrons move to a lower energy level
Metals have "free" electrons, the free electrons in metals help to transfer heat together with the vibrating atoms.
Alpha particles but also electrons and gamma radiations (Th 232).
Electrons can absorb photons and gain energy, and they can emit photons and lose energy.
If there are excess electrons in an atom, the atom is likely to be ionized; that is, the stom will emit the electrons.
Yes, all living things vibrate. You are vibrating right now.
Light waves originate from vibrating electrons.
Atoms emit energy as light when electrons move to a lower energy level
The particle-like features of EM radiation at frequencies of radio waves are almost non-existent. It is far more useful to view such radiation as a vibrating EM-field instead of a photon of almost no energy. When doing so, you can see how a EM wave would result from electrons vibrating back and forth at at set frequency. By setting up an electronic oscillator that has a resonance at a radio wave frequency, you will get electrons vibrating at that frequency; and, from that, an EM wave of that frequency. > are photons emitted only by electrons jumping from higher to lower energy levels? No, there are many other ways to accomplish this.
No, they don't
Metals have "free" electrons, the free electrons in metals help to transfer heat together with the vibrating atoms.
no, only when accelerated
After irradiation with photons metals emit electrons.
Electrons. Electricity is composed of free electrons and some radioactive decays emit electrons (beta particles)
Metals have "free" electrons, the free electrons in metals help to transfer heat together with the vibrating atoms.
Alpha particles but also electrons and gamma radiations (Th 232).