Across
- 4. A halogen in Period 5.
- 7. Atomic number 40.
- 8. It has 18 electrons.
- 9. Has the largest first ionization energy.
- 11. What salt is composed of.
- 13. Number 1 on the atomic scale.
- 15. A Period 4 element that is usually found in milk.
- 16. An element that has a "Cr" symbol.
- 17. An alkaline earth metal that burns with a brilliant white flame.
- 19. The only element that has 2 electrons in its valance shell.
- 20. It makes up about 20% of the air we breathe.
Down
- 1. It has a 78 electrons and a Transition Metal.
- 2. A word derived from the Latin word "cuprum"
- 3. It has an atomic number of 14 and it is also a metalloid.
- 5. K on the periodic table.
- 6. It is a soft, silvery-white alkali metal.
- 10. The third most abundant element in the Earth's crust.
- 12. The symbol 'Fe" on periodic table.
- 14. It has an atomic number 28.
- 18. It is metal but can be in liquid form at room temperature.