This is the year in which Soddy discovered half-life and isotopes (within 5 years)
What is 1900?
100
The existence of protons was established in this year. (Within 5)
What is 1919?
100
In 2012, this particle, known as the "God Particle" was discovered. It helps explain why particles have mass.
What is the Higgs Boson?
200
In 1900, JJ Thompson described the atomic model as a "sphere of positively material with negatively charged electron buried within". This model was also known as The __________ Model.
What is Plumb Pudding?
200
In 1932, Chadwick discovered this in the nucleus.
What is the neutron?
200
This is the antimatter counterpart of the electron which was discovered by Carl Davis Anderson in 1932.
What is Positron?
300
In 1905, Albert Einstein developed his formula of e=mc^2. In which e stands for energy, m for mass, and c for the ______ squared.
What is the speed of light?
300
In 1940, Neils Bohr described the atomic model as a central nucleus containing protons and neutrons with electrons flying around the nucleus in imaginary _______.
What are orbits?
300
The Antiproton, which was discovered in 1955, is the animatter counterpart of this particle.
What is proton?
400
Ernest Rutherford established in 1911 that the nucleus of an atom is positively charged and very _____.
What is dense?
400
In 1964, Murray Gell-Mann and George Zweig propose a theory about these, which are the building blocks of all particles.
What are quarks?
400
The Antineutrino, which was discovered in 1956, is the animatter counterpart of this particle.
What is neutron?
500
In 1914, Rutherford suggests the possibility of ______ in the nucleus.
What are protons?
500
Between 1970-73, the standard model of _____ physics was developed. This describes dozens of particles and their interactions with each other.