Compounds of Sc3+ are not colored, but those of Ti3+ and V3+ are. Why? 1. Sc3+ is a stable cation. 2. Ti3+ and V3+ are not stable cations. 3. Sc3+ has no electrons in d orbitals. 4. Ti3+ and V3+ have d electrons present. 5. Sc3+ is not a stable cation. 6. Ti3+ and V3+ are stable cations. 7. Sc3+ has one electron in d orbitals. 8. Ti3+ and V3+ have two d electrons present.

Apure solvent has a vapor pressure the vapor pressure of a solution. a. equal to b. lower than c. higher than

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)