the d-block contains the transition metals groups of elements.
the d-block contains the transition metals groups of elements.
what groups of elements does the d-block contain?
the transition metals
from left to right across the four blocks of the long- or 32-column form of the periodic table are a series of linking or bridging groups of elements, located approximately between each block. these groups, like the metalloids, show properties in between, or that are a mixture of, groups to either side. chemically, the group 3 elements, scandium, yttrium, lanthanum and actinium behave largely like the alkaline earth metals or, more generally, "s" block metals but have some of the physical properties of "d" block transition metals. lutetium and lawrencium, at the end of the end of the "f" block, may constitute another linking or bridging group. lutetium behaves chemically as a lanthanide but shows a mix of lanthanide and transition metal physical properties. lawrencium, as an analogue of lutetium, would presumably display like characteristics. the coinage metals in group 11 (copper, silver, and gold) are chemically capable of acting as either transition metals or main group metals. the volatile group 12 metals, zinc, cadmium and mercury are sometimes regarded as linking the "d" block to the "p" block. notionally they are "d" block elements but they have few transition metal properties and are more like their "p" block neighbors in group 13. the relatively inert noble gases, in group 18, bridge the most reactive groups of elements in the periodic table—the halogens in group 17 and the alkali metals in group 1.
periodic table
"the united states supreme court: a political and legal analysis" discussed the results of a 1991 survey, stating that: "the court's school prayer decisions were, and still are, deeply unpopular with the public, many politicians and most religions organizations. 95 percent of the population believe in god and some 60 percent belong to a religious organization. in a 1991 opinion poll, 78 percent of americans support the reintroduction of school prayer." as a result of public support for school prayer in the united states, "the oxford companion to the supreme court of the united states" reports, "the public's support for school prayer was translated by various state legislatures into statutes aiding religious schools and practices." analysis of multiple polls since the 1970s by sociologist philip schwadel showed support for school prayer dipped slightly but remains popular with the majority of americans, with a recent 2011 poll showing 65 percent support.
school prayer in the united states