Atoms

3. A solid made of regular repeating patterns of atoms
4. Negatively charged ion
6. Developed the first theory of the atom
10. An electron emitted by a decaying radioactive element
12. A compound made of ionized atoms
15. A chemical connection between atoms
18. Orbits the atom and has a negative electrical charge
19. Process by which a large atom breaks up into two or more smaller fragments
21. When small atoms join to make a single larger atom
23. Where does the word atom come from and what does it mean in Greek?
24. Has a positive electrical charge
25. Made out of the same type of atom chemically bound

1. Made by splitting an atom
2. Made up of atoms not chemically bound
5. Made up of multiple different elements chemically bound
7. The sequence in which a radioactive element breaks down
8. The sum of protons and neutrons in the atom
9. The number of protons and is equal to the amount of electrons an atom has
11. A table of elements arranged by increasing atomic number
13. A positively charged ion
14. An atom that has lost or gained an atom
16. Smallest particle of an element that can exist
17. level The shells around an atomic nucleus each represent a different one of these.
20. Has no electrical charge
22. Makes up protons and neutrons