This has always been confusing for me can anyone explain?!!???

This image is an example of a(n) a) atom. b) compound. c) mixture. d) molecule.

Which is a characteristic of the electron sea model for metallic bonding? molecular orbitals overlap to produce bands. electrons flow easily between metal nuclei. electrons are in fixed positions in the orbitals. atomic nuclei are arranged in an irregular pattern.

What methods could you use to solubilize calcium carbonate