1. Who said the elements are earth, water, air, & fire?
Aristotle

2. Who said the atom’s nucleus contains neutrons?
James Chadwick

3. Who said that a negatively charged particle is an electron in the plum pudding model?
J.J. Thompson

4. Who said that atoms contain 3-D orbitals?
Erwin Schrodinger

5. Who said atoms have a nucleus proven by gold foil experiments?
Ernest Rutherford

6. Who said all matter is made of atoms, yet at the same time his idea was rejected?
Democritus

7. Who said matter is made of atoms and that those atoms are indivisible and indestructible?
John Dalton

8. Who said the electron is in a region of space but there is a level of uncertainty of exact point?
Werner Heisenberg

9. Who said electrons orbit around a nucleus in specific paths?
Niels Bohr

10. Who said electrons behave like waves?
Louis de Broglie