Across
- 2. Earth Metals Soft, silvery-gray elements located in group 2. Contain 2 valence electrons in outer energy levels. Chemically reactive.
- 4. Electrons Electrons located in the outer shell or energy level.
- 7. Substances produced from a chemical reaction.
- 8. Metals Six elements located in group one, excludes Hydrogen, highly reactive. Contains one valence electron in outer energy level.
- 10. Metals Elements in group 3-12, also include elements below the periodic table. True metals that are hard, dense, and malleable. Chemically reactive as the outer energy level is partially filled with electrons.
Down
- 1. Elements that begin with Lanthanum; reactive transition elements.
- 3. A substance that undergoes a change during the reaction.
- 5. Equations A representation of a chemical reaction using symbols to represent elements in the reaction.
- 6. Elements that begin with Actinium are unstable radioactive transition metals.
- 9. of Conservation of Mass Mass cannot be created or destroyed within a closed system.