Across
- 3. Gasses that will not react with anything
- 5. The biggest part of the atom, contains protons and neutrons
- 6. The letters we use to show a certain element
- 8. The steps of the shells of atoms that electrons spin on
- 11. How many protons and electrons an atom has
- 13. Has properties of both metals and nonmetals
- 15. Matter cannot be create
- 18. What is created in a chemical reaction
- 19. Positively charged particle, in the nucleus of an atom
- 20. Negatively charged particle, makes up the shell of an atom
- 21. A mixture of different atoms
- 23. Neutral particle, in the nucleus of an atom
- 24. When a reaction creates energy (heat)
Down
- 1. Column of the periodic table
- 2. A group of atoms that are bonded together
- 4. How massive an atom is
- 7. An electron in the outermost shell of an atom
- 9. The inventor of the modern periodic table
- 10. When a reaction pulls in energy (cold)
- 12. A collection of a single type of atom
- 14. Dull, brittle, and non conductive
- 16. One particle of an element
- 17. Shiny, ductile, and malleable
- 22. Row on the periodic table
- 25. What is put into a chemical reaction