1 - Fundamental particles Flashcards
(10 cards)
In 1661, Robert Boyle discovered…
elements
In 1803, John Dalton discovered…
atoms
In 1897, JJ Thompson discovered…
electrons
In 1909, Ernest Rutherford discovered…
the positively charged nucleus
- suggested a new model called the “nuclear model”
In 1913, Niels Bohr discovered…
that electrons orbit the nucleus in shells
- led to the new model, the “quantum atomic model”
In 1932, James Chadwick discovered…
evidence for the existence of particles in the nucleus with mass but no charge
- these particles are called neutrons
What is the relative charge and relative mass of a proton?
charge: +1
mass: 1
What is the relative charge and relative mass of a neutron?
charge: 0
mass: 1
What is the relative charge and relative mass of a electron?
charge: -1
mass: 1/1836
An atom consists of…
a nucleus containing protons and neutrons surrounded by electrons
