(40) GCSE Chemistry Revision "Alpha-Scattering Experiment"

Plum Pudding Model

An atomic model suggesting that an atom is a ball of positive charge with negative electrons embedded in it.

Alpha Scattering Experiment

An important experiment that showed most alpha particles pass through a thin piece of gold foil, leading to the conclusion that atoms are mainly empty space.

Electrons

Tiny negative particles discovered in 1897 that indicate atoms have an internal structure.

Atomic Nucleus

The central part of an atom, containing a positive charge and most of the atom's mass.

Deflection of Alpha Particles

The phenomenon where alpha particles change direction when passing near the positive center of an atom.

Mass of Atoms

Most of the mass of an atom is contained within the nucleus.

Gold Foil

Used in the alpha scattering experiment because it can be hammered into very thin sheets.

Mainly Empty Space

The conclusion drawn from the alpha scattering experiment, indicating that most of the atom is void.