When solid CaCl2 dissolves in water, which of the following processes releases energy?

What is the hybridization of the carbon atom notated with an arrow in the VX nerve agent molecule shown below? (Note that lone pairs have been omitted for clarity… and because I don’t want to get any of this on me)

Which statement below best explains why Zeff increases slightly down a group in the Periodic Table?

All of the species below are isoelectronic with each other except

An atom with which electron configuration below is expected to have the lowest Electron Affinity (most positive ∆E)?

Which of the following metals reacts most violently with water?

What is the bond angle associated with an sp3d2-hybrid orbital?

Which of the following compounds has an expanded octet around the central atom when the best Lewis Structure is drawn for it?

Which of these statements best describes why Group 8 elements (such as Ar) have smaller (more positive ∆H) electron affinities than other elements?

Which of the following oxyanions has only two equivalent resonance structures?