Which pair of elements is most likely to have similar properties? A. tungsten and osmium
B. osmium and hassium
C. seaborgium and rhenium
D. bohrium and tungsten

What are scientists who study fossils called? ( a ) astronomers. ( b ) biologists. ( c ) geologists. ( d ) paleontologists.

Which reason best explains why metals are malleable? a)because they have delocalized electrons b)because they have localized electrons c)because they have ionic bonds d)because they have rigid bonds

The ammonia molecule in the diagram has the observed bond orientation because