Ch 19 Mouse Mischief

1. Ch 19 Mouse Mischief Physical Science Elements and their Properties

2. At room temperature, most metals are ____. gases liquids radioactive solids

3. The process by which solid iodine particles change directly to gas without first becoming a liquid is called ____. condensation evaporation ionization sublimation

4. Elements that form salts by combining with metals are ____. allotropes fluorides ionics halogens

5. Substances that conduct an electric current only under certain conditions are most likely to be ____. metals metalloids noble gases nonmetals

6. Different forms of the same element that have different properties because of different atom arrangements are called ____. allotropes carbons graphites halogens

7. An allotrope of carbon that is soft and can be used as a lubricant is ____. diamond graphite sand silicon

8. An allotrope of carbon that is hard and is often used in jewelry is ____. diamond graphite quartz silicon

9. Hydrogen is grouped with the alkali metals because it ____. does not readily form compounds has one electron in its outer energy level is a gas is a metal

10. A chemical family whose members exist as reactive diatomic molecules in the gaseous phase is the ____. actinide series alkali metals halogens lanthanide series

11. A chemical family whose members exist as reactive diatomic molecules in the gaseous phase is the ____. actinide series alkali metals halogens lanthanide series

12. When hydrogen reacts with the active metals, it forms a chemical bond by ____. gaining one electron losing one electrons losing two electrons sharing electrons

13. The elements in Groups 3 through 12 of the periodic table are the ____. actinides alkaline earth metals transition elements halogens

14. A family of elements that has two electrons in its outer energy level is the ____. actinides alkaline earth metals alkali metals halogens

15. Metals can be used as wire because they are ____. alloys ductile metallic shiny

16. Elements in which the outer electrons are NOT held tightly are most likely to form ____ bonds. covalent hydrogen metallic radioactive

17. Bromine is the only halogen and nonmetal that is normally a ____. gas liquid semiconductor solid

18. The only metal that is a liquid at room temperature is ____. copper mercury silver sodium

19. A synthetic element that is used in smoke detectors is ____. aluminum americium sodium technetium

20. All synthetic elements are ____. liquids needed by human body radioactive useful in making plastics

21. Cobalt, iron, and nickel are known as the ____ triad. nickel cobalt iron steel

22. Three transition elements in Group 12 of the periodic table are ____. copper, silver, and gold iron, nickel, and cobalt mercury, zinc, and cadmium neon, helium, and xenon

23. Any element with an atomic number greater than that of uranium is a(n) ____. halogen lanthanide transition element transuraniumelement

24. The noble gases are in ____. Group 18 Group 1 Group 13 Group 2

25. Elements that lie along the stair-step line of the periodic table are ____. liquids metals metalloids radioactive

26. The appearance of solid metals can be described as ____. dull glassy powdery shiny

27. A family of elements that contains the most reactive metals is the ____. noble gases alkaline earth metals alkali metals transition elements

28. Radioactive elements comprise a majority of the ____. actinides halogens lanthanides noble gases