If Ba, Barium gave those two dots away to oxygen, then the charge is a: +2 b-200

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium

Which statement best describes the he properties of iconic compounds ?

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.