CROSS WORD PUZZLE

3. The Greek name of atoms according to Democritus, meaning uncuttable.
7. Two or more atoms connected together.
9. At that time, people believed more in his theory than that of Democritus.
10. These are anything that has mass and takes up space.
12. Negatively charged particles that orbit the nucleus in electron clouds or shells.
13. he developed the theory of atomism, and considered the "best guess in antiquity".
14. The heart of the atoms, it's the center where all the mass of the atom is concentrated.

1. Positively charged particles located in the atom's nucleus.
2. He publish the Atomic Theory, He based his theory on experimentalevidence, not on lucky guesses.
4. are atoms of the same element that have the same number of protons (atomic number) but differ in the number of neutrons.
5. He thought that matter is made up of four elements: earth,fire, air and water.
6. Neutral (uncharged) particles also found in the nucleus. They contribute to an atom's mass but not its charge.
8. Democritus based his idea about atom, by cutting this, you will reach a point that you cannot cut it into smaller pieces.
9. the basic building blocks of matter, the incredibly tiny particles that make up everything you see and touch, except energy.
11. Atoms are separated from one another by vacumm and emptiness,