The electron

Question 1

The electron

Answer 1

An indivisible unit of negative charge, of extremely small mass orbiting the nuclei of atoms

Question 2

Properties of the electron

Answer 2

Orbits the nucleus
Very small mass
Negatively charged
Charge on electron is smallest amount of charge found in nature

Question 3

Thermionic Emission

Answer 3

is the giving off of electrons from the surface of a hot metal surface.

Question 4

The cathode ray tube

Answer 4

Question 5

Operation of a Cathode Ray Tube

Question 6

Uses

Answer 6

Properties of cathode rays

Question 7

Cathode rays

Answer 7

Streams of high speed electrons

Question 8

The electron volt (eV)

Answer 8

Question 9

Energy associated with the electron

Answer 9

Question 10

The electron volt formula

Answer 10

Question 11

Electrons in a magnetic

Answer 11

Experience centripetal force therefore mv^2/r

Question 12

The photo electric effect

Answer 12

Question 13

Demonstration of the photoelectric effect

Answer 13

Charge a gold leaf electroscope negatively
Shine ultraviolet light in the zinc plate
Result; the leaves fall together
Observation; Shining UV light on the zinc plate liberates electrons from the zinc and therefore the legs become neutralised and fall back together.