Across
- 3. determines the number of energy levels.
- 5. if the numbers of atoms for each element are the same on both the reactants and product the equation is _________.
- 8. reactivity is determined by an element’s ___________.
- 10. on the left side of the “staircase”, good conductors of heat, malleable and ductile.
- 11. on the right side of the “staircase”,does not conduct heat/electricity, brittle and dull.
- 12. tells you how many atoms of that element are present.
- 13. a substance that forms in a chemical reaction.
- 14. the smallest unit of matter.
- 15. has a neutral charge and is located in the nucleus.
- 16. where most of the mass in an atom is located.
- 17. have properties of both metals and nonmetals.
- 18. The law of conservation of _____ states that _____ cannot be created or destroyed.
Down
- 1. elements in the same ______ share similar physical and chemical properties.
- 2. a substance or molecule that participates in a chemical reaction.
- 4. non-reactive group, group 18.
- 6. tells you how many molecules of that particular compound you have.
- 7. a group of two or more atoms that are chemically bonded together. Ex. H2O
- 9. has a negative charge and is located in a cloud outside of the nucleus.
- 13. this subatomic particle identifies an element.