Changes in the Atomic Model (AQA GCSE Physics): Flashcards

1897

Ball of positive charge with negative electrons embedded in it

A few atoms thick

Positive

Most alpha particles passed straight through

Empty space

Nucleus

Nuclear model

Orbit nucleus at specific distances (energy levels/shells)

James Chadwick

$0.1$ nm or $1 \times 10^{-10}$ m

$1 \times 10^{-14}$ m

Charge: $+1$, Mass: $1$

Charge: $0$, Mass: $1$

Charge: $-1$, Mass: very small