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ch 6 chem test
ch 6 sections 1-4. review and reinforcement packet
| Question | Answer |
|---|---|
| which of these metals is not an alkali metal? | iron |
| alkali metals must be stored under oil because of their extreme | reactivity |
| The only alkali metal to be produced commercially in large amounts is | sodium |
| the alkaline earth metals are not as reactive as the alkali metals because | they have higher ionization energies |
| which of the following alkaline earth metals is radioactive? | radium |
| magnesium is produced commercially by | recovering it from sea water and mineral deposits. |
| Calcium carbonate forms the __________ of marine animals, such as oysters. | shell |
| magnesium reacts with ________ , which makes magnesium fires very hard to fight. | hot water |
| a compound containing the alkali metal, _____________, is used to treat manic depression. | lithium carbonate |
| the alkali metals are malleable, ductile, and good conductors of _________ | electricity |
| the most reactive metals are found in the ____ block of the periodic table | s |
| alkali metals cannot be used as structural metals because they are ________ elements | soft |
| The ionization energies of the alkali metals _______ as you go down the family. | decrease |
| the name alkali comes from an arabic word that means______ | ashes |
| Crystal containing the alkaline earth metal, ________ give emeralds their green color. | beryllium |
| Because the alkali metals are very reactive, they are ______ found as pure metals in nature. | not |
| Why is beryllium a better choice than iron to use in an alloy for making airplanes? | durable, lightweight, less dense, strong as steel |
| why does sodium have a higher ionization energy than cesium? | cesium has more electrons than sodium |
| why do the alkali metals have lower ionization energies than the alkaline earth metals? | are not as reactive as the alkali metals |
| how did the alkaline earth metals get their name? | earth came from alchemists of the middle ages. alkaline came from behavior of group 1a |
| transition metals play an important role in LIVING ORGANISMS | true |
| Most reaction metals have high densities and LOW melting points | false high |
| COPPER is a hard silver metal whose ions exhibit a variety of different colors. | false chromium |
| Because it is so STRONG iron has been used by people for thousands of years. | false common |
| hemoglobin contains the element COBALT | fasle iron |
| what properties of chromium make it ideal as a protective coating over other metals | resistant to corrosion |
| define the term alloy. | solid solution in which the atoms of two or more metals are uniformly mixed. |
| why are gold alloys more commonly used for jewelry than pure gold? | because of its appearance and resistance to corrosion |
| why is iron such a significant metal? | |
| all isotopes of the actinides series are | radioactive |
| the elements of the _________ series are called lanthanides after the element lanthanum. | 4f |
| the lanthanides are all very similar to one another because | they all lose 3 electrons to form 3+ ions |
| the lanthanides are difficult to separate from one another because | they occur together in nature and their properties are very similar. |
| the only actinides that occur to any extent in nature are | thorium and uranium. |
| all the elements after _________ are artificial elements | uranium |
| what are the primary commercial uses of the lanthanides? | little commercial importance |
| how are the artificial actinide element produced? | nuclear bombardment reactions |
| why is there a conflict over the placement of the f block elements in the periodic table? | all the elements from lanthanum to lutetium have similar properties |
| how do the properties of the lanthanide metals compare to those of the alkaline earth metals | soft metals and very reactive |
| aluminum does not corrode in air because a layer of ALUMINUM OXIDE forms on its surface | true |
| more than 40 billion kilograms of HYDROGEN SULFIDE is produced annually and used in all manufacturing processes. | false sulfuric acid |
| carbon monoxide is produced when hydrocarbons are burned in a PLENTIFUL supply of oxygen | false limited |
| BORON is a major component of fossil fuels. | false carbon |
| GERANIUM is the major component of glass. | false silica |
| Nitrogen makes up approximately 80 PERCENT of the Earth's atmosphere. | true |
| oxygen combines with the most elements to form compounds called | oxides |
| the largest use of sulfur is in the production of | sulfuric acid |
| all of the halogens exist in element form as ______ molecules | diatomic |
| the most reactive element is | fluorine |
| natural gas wells are major source of todays | argon |
| the most industrially useful halogen which is used to disinfect drinking water is | chlorine |
| there are no known compound of | helium, neon, and argon |
| the formation of nitrogen compounds from nitrogen gas is called | nitrogen fixation |
| why is carbon considered to be unique among the elements | in all living organisms |
| compare the two forms of elemental oxygen | ozones and oxides |
| hydrogen is placed at the top of the group __ column of elements | 1A |
| Hydrogen has __ valence electrons | 1 |
| hydrogen exists as a _ under normal conditions | gas |
| organic compounds frequently contain hydrogen bonded with | carbon |
| in terms of mass, hydrogen is the ____ most abundant element on earth | ninth |
| ____ is the most abundant element in the universe | hydrogen |
| Compare hydrogen with the group 1a metals in terms of their ionization energy. How can you explain the difference? | greater than lithium |
| why is hydrogen so rare in the atmosphere? | it is light enough to escape earths gravitational attraction |
| list four sources of hydrogen containing compounds. | coal petroleum natural gas and plants and animals |
| describe three uses of hydrogen containing compounds | methanol ammonia hydrogenation of unsaturated oil |
| how can hydrogen be produced from ware | can get hydrogen from evaporation of can pull it from hydrocarbons |
Created by:
EmmaRoseDavis