Question

a b c d e fixed orbit / bohr model billiard ball model nuclear model electron cloud model blueberry muffin / plum pudding module

Explanation:

A is the Billiard Ball Model as it represents an atom as a solid sphere. B is the Blueberry Muffin/Plum Pudding Model with negative - charged 'blueberries' (electrons) in a positive 'dough'. C is the Nuclear Model with a central nucleus and electrons around it. D is the Fixed Orbit/Bohr Model with electrons in specific orbits around the nucleus. E is the Electron Cloud Model showing the probability of electron location.

Answer:

A. Billiard Ball Model
B. Blueberry Muffin / Plum Pudding Model
C. Nuclear Model
D. Fixed Orbit / Bohr Model
E. Electron Cloud Model