Which one of these chemical equations is already balanced? (Hint: count how many of each kind of atom on each side). You can use scratch paper.
Ca + 202 - 2Cao,
2Ca + 02 - 2Cao
Ca + 0, - Cao
Ca + 20
2Ca + O2

According to the valence shell electron pair repulsion (vsepr) theory, a molecule that has four electron groups around the central atom will exhibit what electron geometry? view available hint(s) according to the valence shell electron pair repulsion (vsepr) theory, a molecule that has four electron groups around the central atom will exhibit what electron geometry? trigonal bipyramidal tetrahedral square planar determination of electron geometry requires information on whether the electron groups are lone pairs or bonding groups.