Atomic Theory

2. Visual representation of key developments in the evolution of atomic theory over time.
4. Niels Bohr's atomic model featuring electrons in specific energy orbits around the nucleus.
6. Scientist who developed the early 19th-century atomic theory, suggesting atoms are indestructible and identical.
9. Anything that has mass and occupies space, composed of atoms.
11. Specific orbits or shells where electrons are found in Bohr's atomic model.
12. Ancient Greek philosopher who proposed the concept of indivisible particles called "atomos."
13. Central, positively charged region of an atom, discovered by Rutherford.

1. Democritus' idea that matter is composed of tiny, unbreakable particles.
3. Negatively charged subatomic particle discovered by J.J. Thomson in the late 19th century.
5. Branch of physics that describes the behavior of particles on the atomic and subatomic scale.
7. The arrangement of protons, neutrons, and electrons within an atom.
8. Scientist who conducted the gold foil experiment, revealing the existence of a small, dense atomic nucleus.
10. Scientific explanation of the nature and behavior of matter at the atomic level.