Atoms and the Periodic Table
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
卡片预览 (12 张)
Who first developed the theory of atoms?
Democritus of Abdera atom is the greek word for indivisible
What are the four original elements of atoms according to Aristotle?
• earth • wind • fire • water
What is the French chemist Antoine Lavoisier known for?
The Law of Conservation of Matter which says matter cannot be created or destroyed, it can only change states
What is John Dalton, who was also an English school teacher, known for?
He developed the Atomic Theory.
What is JJ Thomson, the English physicist known for?
He invented the cathode ray tube. He created the Plum Pudding Model.
What’s special about the cathode ray tube?
• Waves get deflected when exposed to a magnetic field • It helped in the discoverey electrons
What is the Plum Pudding Model?
There is a sphere of positive mass with negatively charged particles in it.
What is the English physicist Ernest Rutherford known for?
The Gold Foil Experiment
What’s special about the Gold Foil Experiment
• They bombarded a sheet of gold foil with alpha particles. • Particles should have easily passed through , but some deflected. • They discovered the nucleus. • “It was like a 15 inch shell was fired at tissue paper and was deflected right back
What is the Danish physicist Niels Bohr known for?
The Bohr Model of the Atom. Electrons move around the nucleus in a fixed distance
What is Louis-Victor de Broglie known for?
The Electron Cloud Model. Electrons exist in charged levels known as orbitals.
What is the English physicist James Chadwick known for?
He discovered the existence of neutrons. He’s responsible for the birth of Nuclear Chemistry.