James Clerk Maxwell
Leucippus and Democritus
"Atomos" - Uncuttable
Robert Boyle
Dismantles
Alchemy
Matter is made of smaller parts
re-introduces
Antoine-Laurent de Lavoisier
Law of Conservation of Mass
Elements
John Dalton
Atomic Theory
Robert Brown
Brownian Motion
Michael Faraday
Electromagnetics
Maxwell's Equations
Electromagnetic Fields
Heinrich Rudolf Hertz
Ruhmkorff high-voltage coil
Photoelectric effect
Radio Transmission
Traveling Electromagnetic Waves
confirms
Antoine Henri Becquerel
Hears a Report on
Predicts change in velocity of an electrical charge would lead to electromagnetic waves
Wilhelm Conrad Röntgen
X-rays
Experiments with powdered uranium compounds to produce
Radioactivity
teaches
Marie Curie
Names
Ernest Rutherford
Works for
J.J. Thomson
Atom composed of heavy ball of positive charge and small electrons of positive charges
Plum Pudding Model
Atoms can be broken down
Works with and Marries
Pierre Curie
Develops an Advanced Electrometer
Radioactivity is an Atomic Property
Polonium
Radium
Uranium
Radiation exposure leads to illness
rethinks
Characterizes two types of Radiation
Adds onto idea
Alpha
Beta
Colleagues
Frederick Soddy 
Half Lives
Isotopes
Studies Cathode Rays
Proves Beta Rays are
Radioactive material releases lots of energy
Comments about explosive power
Philipp von Lénárd
Works on abandoned project by
Hantaro Nagaoka
inspired by early work of
Questions
Saturn Model of Atom
Gold Foil Experiment
Hans Geiger
Geiger Counter
Ernest Marsden
Testing claims of
Atoms are mainly void
Common Model of the Atom
Albert Michelson
Edward Morley
Aether Experiment
Light does not move through a medium
Albert Einstein
Kicks off
Quantum Mechanics
Mass-energy Relation
Relativity
Published non-theoretician versions of his work
Max Planck
studies
Limit to energy transferred from light to electron
shows
explains
revises
lends credibility to
Soddy did not remain a researcher in radioactivity. He left the field, and largely science, in 1914. From here on he had huge interest in economics. He was incredibly frustrated with what he saw as a lack of utilization of scientific and technological advances. He applied his physics perspective to economic problems, criticizing the idea of an economy generating infinite wealth as being equally ridiculous to a perpetual motion machine. He was dismissed as a crank after publishing four books on the subject. Source