The Periodic Table (p.160-172)
Across
- 2. Properties similar to both metals and nonmetals. Example: Silicon
- 5. The most abundant element in the universe.
- 10. These elements are the inner transition metals that are all radioactive.
- 12. A component of chlorophyll.
- 15. Mendeleev's periodic table gained credibility because he left ______ for elements that were not yet discovered.
- 17. Group 13 is the ______ family.
- 18. Can be drawn into wires
- 21. Dobereiner organized the elements into groups called _______.
- 23. Good conductors of heat and electric current, found on the left hand side of the periodic table.
- 24. Group 15 is the ______ family.
- 25. Elements in Group 3-12. These elements are highly colored metals.
- 27. The vertical columns in the periodic table.
Down
- 1. In 1869 this man organized the periodic table in order of increasing atomic mass.
- 3. The first element to be named after a living person.
- 4. How many classes of elements are there?
- 6. Group 16 is the ______ family.
- 7. When elements are arranged in order of increasing atomic number, there is a periodic repetition of their physical and chemical properties.
- 8. The horizontal rows in the periodic table.
- 9. Group 2 elements. Means "the ashes".
- 11. Group 17 elements. Name is derived from the latin words for "salt" and "genesis"
- 13. Most of these elements are gases at room temperature. They are found on the right hand side of the table.
- 14. Group 1 elements.
- 16. Gases have this color symbol on page 168.
- 19. Group 14 is the ______ family.
- 20. In the modern periodic table, elements are arranged in order of increasing _______ _______.
- 22. Can be hammered into sheets
- 26. Group 18 elements. They are very unreactive.