3-2 Internal Structure of Atoms
What is a subatomic particle
A smaller particles that make up an atom and there are three main types
What is a radioisotope
An unstable atom undergoes radioactive decay
What are the two parts of the cathode ray tube
Anode (+)where the electrons enter the metal the cathode (-) where the electrons leave the metal
What is an isotope
Atoms of the same element with different numbers of neutrons
What did JJ Thomson contribute
He did the cathode ray tube experiment to show evidence of subatomic particles
What did Ernest Rutherford do
He did the gold foil experiment where he used alpha particles(+) shot them and a thin gold foil and measured the angle at which the particles were deflected
What is the strong force in Coulombs law
It's what holds protons and neutrons as a stable nucleus
What were the results to Rutherford's experiment
Most particles passed through somewhere deflected some kidney straight back and it showed a dense nucleus with lots of empty space around it
What are the three main types of subatomic particles
Protons neutrons and electrons
What did the Cathode ray tube experiment and JJ Thompson proof
That electrons have mass and the negative charge because they just liked it when a magnet was applied to the tube
What is Coulomb's law
The closer two charges come together the greater the force between them
What did JJ Thomson say about all atoms
The electrons were embedded in positively charged ball of matter
What is the atomic number
The number of protons in the nucleus of an atom
What is the mass number
The total number of protons and neutrons in the nucleus or the number of particles in the nucleus