Module 4

Question 1

Plum pudding model

Answer 1

Proposed by Joseph J Thomson, the plum-pudding model depicted the atom as negatively charged particles floating in a positively charged sphere.

Question 2

Rutherford model

Answer 2

Proposed by Ernest Rutherford, the model depicts electrons as particles which move through empty space around a large positively charged nucleus.

Question 3

mass spectrometry

Answer 3

A technique used to analyze a substance and determine its mass to charge ratio.