In the region of the periodic table associated with the transition elements which type of orbitals are being filled?
A) s
B) p
C) d
D) f
C
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If the earth stopped rotating about its axis but continued to revolve around the sun,
A) temperatures across the earth would become much more uniform. B) half of the earth would become much warmer and half would become much colder. C) summers would get warmer everywhere on earth. D) winters would get colder everywhere on earth.
Acid rain is caused primarily by
A. burning gasoline. B. burning high-sulfur coal. C. the greenhouse effect. D. nuclear power generation.
What type of silicate minerals is shown from this arrangement of silicon tetrahedron?
A. independent tetrahedra B. sheets C. single chains D. frameworks E. double chains
Which of the following best matches the description?Process of changing the natural community to encourage the increase in populations of certain desirable species.
A. reforestation B. threatened species C. speciation D. biodiversity E. clear-cutting F. extinction G. selective harvesting H. mutation I. patchwork clear-cutting J. endangered species K. species diversity L. habitat management M. cover