Across
- 2. A column of elements on the Periodic table having similar properties and the same valence electron number
- 5. a number in front of a chemical formula stating how many sets of the compound is being used.
- 6. A starting substance in a chemical reaction
- 8. A subatomic particle with no charge
- 9. two or more substance not chemically combined together in the same contanier
- 10. the number of protons added to the number of neutrons in an atom of an element
- 11. A substance produced in a chemical reaction
- 13. A subatomic particle with a negative charge
- 14. a number located immediately after the atoms symbol that it states how many atoms of that element is in the coumpound
- 15. The smallest particle of an element
Down
- 1. A substance whose particle is made of two or more different kinds of elements
- 3. The number of protons in an atoms nuclus
- 4. A positive charged subatomic particle
- 7. A fundimental substance that cannot be broken down into a simpler substance by chemical or physical means
- 12. a row of elements of the periodic table having the same number of energy levels that electrons are in
- 14. a one or two letter combination used to represent a type of element in chemical equations