Across
- 5. What is the only metal that is a liquid at room temperature?
- 7. Type of metals mostly geologic minerals that are dissolved slightly in water
- 8. Which category has good conductors of heat and electricity; usually hard, lustrous, malleable, and ductile
- 10. Which has the smaller atomic radius, lower left or upper right of P.T.?
- 12. Oxygen combines with other elements to form compounds called
- 13. Which category are generally gases or soft solids?
- 14. Who was credited with developing the first ordered table of elements?
- 15. Which property measures the attraction of bonded atoms to electrons?
- 17. A positively charged ion
- 18. the distance from the center of the atom’s nucleus to its outermost electron
- 20. Which of the following is the lightest, most abundant element, extremely flammable in air?
- 21. The lanthanoid and actinoid series together compose what grouping on the periodic table?
- 23. Semiconductors can also be called
Down
- 1. Graphite and ___ are both composed of the element carbon
- 2. A larger atomic radius means a _____ionization energy
- 3. Which element is the most reactive as well as the most electronegative?
- 4. Elements in the same group have similar physical and chemical properties because of ____ configuration
- 6. An element that has a silvery luster, conducts electricity well, and is highly reactive is most likely
- 9. Group 15 is also known as the
- 11. Which property measures the energy required to remove an outermost electron?
- 16. The chemist who arranged elements according to increasing atomic masses (law of octaves)
- 19. Whose work resulted in the atomic number being used to organize the periodic table?
- 22. helium, neon, argon, krypton, xenon, and radon