Question

question 2
1 pts
who was the first person to suggest the idea of electrons?
thomson
democritus
dalton
bohr

Explanation:

• Thomson: In 1897, J.J. Thomson discovered the electron through cathode - ray tube experiments. He proposed the "plum - pudding" model of the atom, where electrons were embedded in a positively charged "soup".
• Democritus: He was an ancient Greek philosopher who proposed the concept of atoms (indivisible particles) in the 5th century BCE. But his ideas were more philosophical and not related to electrons.
• Dalton: John Dalton proposed the modern atomic theory in the early 19th century. His theory focused on atoms as the basic units of elements and chemical reactions, but he did not know about electrons.
• Bohr: Niels Bohr proposed a model of the atom in 1913 where electrons move in quantized orbits around the nucleus. But this was after the discovery of electrons.

Answer:

Thomson