Predict the ground-state electron configuration of the following ions. write your answers in abbreviated form, that is, beginning with a noble gas in brackets.
a). cr2+
b.)cu2+
c.)co3+

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