Amber; also, the alloy of gold and silver, called electrum.

one of the fundamental subatomic particles, having a negative charge and about one thousandth the mass of a hydrogen atom. The electron carries (or is) a natural unit of negative electricity, equal to 3.4 x 10-10 electrostatic units, and is classed by physicists as a lepton. Its mass is practically constant at the lesser speeds, but increases due to relativistic effects as the velocity approaches that of light. Electrons are all of one kind, so far as is known. Thus far, no structure has been detected within an electron, and it is probably one of the ultimate composite constituents of all matter. An atom or group of atoms from which an electron has been detached has a positive charge and is called a cation. Electrons are projected from the cathode of vacuum tubes (including television picture tubes) as cathode rays and from radioactive substances as the beta rays. Previously also referred to as corpuscle, an obsolete term. The motion of electrons through metallic conductors is observed as an electric current. A particle identical to the electron in mass and most other respects, but having a positive instead of a negative charge, is called a positron, or antielectron

(e-) Compare with proton and neutron. A fundamental consituent of matter, having a negative charge of 1.602 176 462 × 10-19 coulombs ± 0.000 000 063 × 10-19 coulombs and a mass of 9.109 381 88 × 10-31 kg ± 0.000 000 72 × 10-31 kg [ 1998 CODATA values].

Electrons are negatively charged subatomic particles. The mass of an electron me = 9.1094x10-28 g, which is 1/1837 of the mass of a proton or a neutron. Electrons orbit the atomic nucleus

a micro black hole with one photon trapped inside

a micro reproduction of a Primordial Singularity

a microscopic entity, on the quantum level, and it behaves like something on the quantum level

a photon, or a quantum of action frozen into mass

Electron is a Visa debit card. Anything you buy with an Electron card has to be authorised electronically which means the transaction is more secure. Since you cannot go overdrawn without permission, the issuer can give a debit card to someone opening their first bank account, such as school leavers.

a debit card, and can be used for a cash withdrawal

A Visa debit card. All Electron purchases are subject to electronic authorisation.

A Visa International debit card for use in on-line Point of Sale devices. All Electron branded cards are electronic only, zero floor limit cards and are normally not embossed. Participating merchants must meet electronic requirements and display Electron decals.