Interaction between molecules that causes a chemical change, converting an existing substance into a new substance

__ _ _ _ _ is the process of removing earth materials from their original sites through weathering and transport and depositing the in another location. a. erosion b. sedimentation c. lithification d. dissolution

Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )