🔍Atoms are the smallest units of matter and cannot be divided further.
🔬John Dalton proposed the concept of atoms based on the laws of conservation of mass and multiple proportions.
⚛️J.J. Thomson discovered electrons, which led to the plum pudding model of the atom.
💥Ernest Rutherford's gold foil experiment disproved the plum pudding model and revealed that atoms have a dense nucleus.
🌌Rutherford's experiment showed that atoms are mostly empty space with a small, dense nucleus.
What are atoms made of?
—Atoms are made up of subatomic particles called protons, neutrons, and electrons.
How did John Dalton propose the concept of atoms?
—John Dalton proposed the concept of atoms based on the laws of conservation of mass and multiple proportions.
What did J.J. Thomson discover?
—J.J. Thomson discovered electrons using cathode ray tubes.
What did Ernest Rutherford's gold foil experiment reveal?
—Ernest Rutherford's gold foil experiment revealed that atoms have a dense nucleus and are mostly empty space.
What is the plum pudding model of the atom?
—The plum pudding model suggests that atoms are a positively charged sphere with negatively charged electrons scattered throughout.
01:10Atoms are the fundamental units of matter.
04:36John Dalton proposed the concept of atoms based on the laws of conservation of mass and multiple proportions.
09:33J.J. Thomson discovered electrons using cathode ray tubes and proposed the plum pudding model of the atom.
12:58Ernest Rutherford's gold foil experiment disproved the plum pudding model and revealed the dense nucleus within atoms.
14:36Rutherford's experiment showed that atoms are mostly empty space with a small, dense nucleus.
