Across
- 1. The element with an atomic number of 8, combined with Hydrogen to make water.
- 5. An element that lacks most of the properties of metals
- 6. A combination of two or more atoms
- 9. The element with the symbol of Au
- 11. Two or more substances mixed together but not chemically combined
- 12. central core of an atom containing protons and usually neutrons
- 16. The element with an atomic number of 1
- 17. The smallest part of an element
- 18. electron/The electrons farthest away from the nucleus of the atom, involved in chemical reaction
Down
- 2. A small particle in the nucleus of the atom with no electrical charge
- 3. A tiny negatively charged particle that moves around the nucleus of an atom
- 4. gas/ An element in group 18 of the periodic table
- 7. substance made of two or more elements chemically combined
- 8. substance that can not be broken down into other substances by chemical or physical means
- 10. table/ A chart of the elements showing the repeating pattern of their properties
- 13. symbol/ A one of two letter representation of an element
- 14. A small positively charge particle in the nucleus of the atom
- 15. The element with an atomic number of 2, used to inflate balloons
- 19. number/The number of protons in the nucleus of an atom