A natural resource that is not replaced by nature in a useful time frame. A. non-renewable resource
B. natural resource
C. renewable resource
D. conservation
(For science)

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.

How do dying stars contribute to the formation of planets

What is bromine+calcium iodide--> calcium bromide +iodine balanced