Enumerate Dalton's atomic theory and state five properties of cathode rays.

Here are the solutions to all the questions:

Question 1: Atomic Structure and Cathode Rays

a) Enumerate Dalton's atomic theory
Dalton's atomic theory postulates:

• All matter is composed of extremely small, indivisible particles called atoms.
• Atoms of a given element are identical in size, mass, and other properties; atoms of different elements differ in size, mass, and other properties.
• Atoms cannot be created or destroyed, nor can they be changed into atoms of another element.
• Atoms of different elements combine in simple whole-number ratios to form chemical compounds.
• In chemical reactions, atoms are combined, separated, or rearranged.

*b) State five properties of cathode