The atom: Who discovered or developed it?
This person proposed the first idea of an atom.
Who is Democritus?
Dalton's model looked like a....
What is a marble?
Most of the mass of an atom is found here.
Atoms of the same element have different number of neutrons.
What is an isotope?
This person developed the first model of an atom.
Who is Dalton?
Thomson's model looked like a ....
What is a chocolate chip cookie?
The mass of this particle is smaller than protrons/neutrons.
What is an electron?
This person discovered electrons.
Who is Thomson?
The number of this particle equals the atomic number of an element.
What is a proton?
This person discovered the nucleus.
Who is Rutherford?
This person discovered neutrons.
Who is Chadwick.