PS Ch. 5 "The Periodic Table"
Across
- 2. negatively charged ion (Cl⁻¹, O⁻², etc.)
- 4. Most reactive of all nonmetals; symbol is F.
- 7. Highly reactive, nonmetal, Group 17 elements of the periodic table that often gain 1 electron while forming -1 ions; Include F, Cl, Br, I, and At.
- 10. Elements on the periodic table that have been made in a laboratory and are not naturally occurring.
- 11. An element with metallic properties that Mendeleev predicted so he left a spot open for it on the periodic table.
- 13. When elements are arranged in order of increasing atomic number, there is a repetition of their physical and chemical properties.
- 17. Non-reactive like the noble gases.
- 19. An ion with a positive charge (Na⁺¹, Ca⁺², etc..
- 20. Metallic, group 2 elements of the periodic table that often lose 2 electrons while forming positive ions. Include Be, Mg, Ca, Sr, Ba, and Ra.
- 21. Sometimes called "metalloids," 6 elements that can conduct electricity under certain conditions and are the main components of chips in computers and other electronic devices. Silicon and germanium are two examples.
- 24. The elements within a single vertical column of the Periodic Table.
- 25. Less reactive metals found in groups 3-12 of the periodic table which can often form various + ions, and has a partially filled d orbitals and possibly f orbitals.
- 26. Elemental symbol is Cu.
- 27. Elements that are generally gases or dull,brittle solids that are poor conductors of heat and electricity, but good insulators.
- 29. Elemental symbol is Au.
Down
- 1. Elemental symbol is C.
- 3. An atom that gains or loses electrons to become - or + charged.
- 5. Natural materials from which metals can be profitably extracted.
- 6. A material in which electrons are not able to move easily; electricity does not flow through it. Characteristic of nonmetals.
- 8. Metals in Group 1 of the periodic table that are highly reactive metals that often lose 1 electron while forming positive ions. Include Li, Na, K, Rb, Cs, and Fr.
- 9. Group 18 elements, inert; 8 valence electrons.
- 12. different forms of the same element having different molecular structures; for example, diamonds and graphite are examples of Carbon.
- 14. A group of chemical elements on the periodic table shown in two rows below all the other elements. They include elements 57-71 (lanthanides) and 89-103 (actinides).
- 15. Elements 1 through 92 (except for elements 43 and 61) can all be found in the earth's crust, atmosphere, or oceans.
- 16. Elemental symbol is Ne.
- 18. Most reactive of all metals; symbol is Fr.
- 22. Elemental symbol is Hg.
- 23. Horizontal row in the periodic table.
- 28. The majority of elements in the periodic table that are often shiny, malleable, good conductors of electricity and heat, solid, difficult to melt, and forming positive ions by losing electrons.